The angular velocity of the tricycle wheel is three times that of the bicycle wheel (ω_tricycle / ω_bicycle = 3) and it would not be safe to make a child tricycle/adult bicycle tandem.
To determine the angular velocity ratio between the tricycle wheel and the bicycle wheel, we can use the relationship between linear speed, angular velocity, and the radius of a rotating object.
The linear speed of both wheels is the same since they are traveling at the same translational speed.
Let's denote the linear speed as v.
For the bicycle wheel, let's denote its radius as r_bicycle.
For the tricycle wheel, let's denote its radius as r_tricycle.
The relationship between linear speed and angular velocity is given by:
v = ω * r,
where v is the linear speed, ω (omega) is the angular velocity, and r is the radius of the rotating object.
For the bicycle wheel, we have:
v_bicycle = ω_bicycle * r_bicycle.
For the tricycle wheel, we have:
v_tricycle = ω_tricycle * r_tricycle.
Since both wheels have the same linear speed, we can set the two equations equal to each other:
v_bicycle = v_tricycle.
ω_bicycle * r_bicycle = ω_tricycle * r_tricycle.
We can rewrite this equation in terms of the angular velocity ratio:
ω_tricycle / ω_bicycle = r_bicycle / r_tricycle.
Given that the radius of the bicycle wheel is 3.00 times that of the tricycle wheel (r_bicycle = 3 * r_tricycle), we can substitute this into the equation:
ω_tricycle / ω_bicycle = (3 * r_tricycle) / r_tricycle.
ω_tricycle / ω_bicycle = 3.
Therefore, the angular velocity of the tricycle wheel is three times that of the bicycle wheel (ω_tricycle / ω_bicycle = 3).
Based on this, it would not be safe to make a child tricycle/adult bicycle tandem because the tricycle wheel would rotate at a much higher angular velocity than the bicycle wheel, potentially causing stability issues and safety concerns.
Learn more about angular velocity https://brainly.com/question/6860269
#SPJ11
An open container holds ice of mass 0.505 kg at a temperature of -19.4 ∘C . The mass of the container can be ignored. Heat is supplied to the container at the constant rate of 860 J/minute . The specific heat of ice to is 2100 J/kg⋅K and the heat of fusion for ice is 334×103J/kg.
a. How much time tmeltstmeltst_melts passes before the ice starts to melt?
b. From the time when the heating begins, how much time trisetriset_rise does it take before the temperature begins to rise above 0∘C∘C?
Ice takes 23.37 minutes before the ice starts to melt. It takes 196.2 minutes from the time when the heating begins until the temperature of the system starts to rise above 0°C.
a) The heat required (Q) :
Q = mcΔT
Where:
m = mass of ice = 0.505 kg
c = specific heat of ice = 2100 J/kg⋅K
ΔT = change in temperature = 0°C - (-19.4°C) = 19.4°C
Q = (0.505 ) × (2100) × (19.4) = 20120.1 J
Since heat is supplied at a constant rate of 860 J/minute,
t(melts) = Q / heat supplied per minute
t(melts) = 20120.1 / 860 = 23.37 minutes
Hence, it takes 23.37 minutes before the ice starts to melt.
b) The heat required to melt the ice (Qmelt):
Q(melt) = m × Hf
Where:
m = mass of ice = 0.505 kg
Hf = heat of fusion for ice = 334×10³ J/kg
Q(melt )= (0.505 ) × (334×10³) = 168.67×10³ J
Since heat is supplied at a constant rate of 860 J/minute,
t(rise) = Qmelt / heat supplied per minute
t(rise) = (168.67×10³) / (860) = 196.2 minutes
Hence, it takes 196.2 minutes from the time when the heating begins until the temperature of the system starts to rise above 0°C.
To know more about the specific heat:
https://brainly.com/question/31608647
#SPJ4
Ice takes 23.37 minutes before the ice starts to melt. It takes 196.2 minutes from the time when the heating begins until the temperature of the system starts to rise above 0°C.
a) The heat required (Q) :
Q = mcΔT
Where:
m = mass of ice = 0.505 kg
c = specific heat of ice = 2100 J/kg⋅K
ΔT = change in temperature = 0°C - (-19.4°C) = 19.4°C
Q = (0.505 ) × (2100) × (19.4) = 20120.1 J
Since heat is supplied at a constant rate of 860 J/minute,
t(melts) = Q / heat supplied per minute
t(melts) = 20120.1 / 860 = 23.37 minutes
Hence, it takes 23.37 minutes before the ice starts to melt.
b) The heat required to melt the ice (Qmelt):
Q(melt) = m × Hf
Where:
m = mass of ice = 0.505 kg
Hf = heat of fusion for ice = 334×10³ J/kg
Q(melt )= (0.505 ) × (334×10³) = 168.67×10³ J
Since heat is supplied at a constant rate of 860 J/minute,
t(rise) = Qmelt / heat supplied per minute
t(rise) = (168.67×10³) / (860) = 196.2 minutes
Hence, it takes 196.2 minutes from the time when the heating begins until the temperature of the system starts to rise above 0°C.
Learn more about the specific heat:
brainly.com/question/31608647
#SPJ11
Timer A typical exposure from a dental X-ray is 7 mrem. A typical human head has a mass of 4 ka. How much energy is deposited in your head when you got an X-ray?
The energy deposited in your head during an X-ray is approximately 0.028 Joules.
To calculate the energy deposited in your head during an X-ray, we can use the given exposure of 7 mrem (millirem) and the mass of a typical human head, which is 4 kg.
First, let's convert the exposure from millirem to rem. Since 1 rem is equal to 0.001 J/kg, we can convert it as follows:
Exposure = 7 mrem × (1 rem / 1000 mrem) = 0.007 rem
Next, we can use the formula:
Energy = Exposure × Mass
Substituting the values into the equation:
Energy = 0.007 rem × 4 kg = 0.028 J
Therefore, approximately 0.028 Joules of energy is deposited in your head during an X-ray. This represents the amount of energy absorbed by the tissues in your head during the X-ray procedure. It's important to note that X-ray exposures are carefully controlled to minimize the risks and ensure the safety of patients.
To learn more about energy deposited, Visit:
https://brainly.com/question/31980920
#SPJ11
1. A steel bar of area 20mm² is under a force of 5000N, work out the stress. (3 marks)
Stress is a measure of the internal force experienced by a material due to an applied external force. To calculate the stress in the steel bar, we can use the formula: Stress = Force / Area. Therefore, the stress in the steel bar is 250,000,000 N/m² or 250 MPa (megapascals).
Given:
Force = 5000 N
Area = 20 mm²
First, we need to convert the area to square meters since the force is given in Newtons, which is the SI unit.
1 mm² = (1/1000)^2 m² = 1/1,000,000 m²
Area in square meters (A) = 20 mm² * (1/1,000,000 m²/mm²) = 0.00002 m²
Now we can calculate the stress:
Stress = Force / Area
Stress = 5000 N / 0.00002 m²
Stress = 250,000,000 N/m²
Therefore, the stress in the steel bar is 250,000,000 N/m² or 250 MPa (megapascals).
To learn more about, internal force, click here, https://brainly.com/question/32068975
#SPJ11
A charge particle moving at a speed of 263 m/s along the x-axis. A magnetic field of magnitude 0.5T along the y-axis. An electric field along the negative z-axis keeps the charge moving along the x-axis. What must be the value of the electric field?
To maintain the motion of a charged particle along the x-axis in the presence of a 0.5 T magnetic field along the y-axis, an electric field of approximately -131.5 N/C is required along the negative z-axis.
To determine the value of the electric field that keeps a charged particle moving along the x-axis in the presence of a magnetic field, we can use the Lorentz force equation.
The Lorentz force experienced by a charged particle moving in a magnetic field is given by the equation:
F = q * (v x B)
Where F represents the force, q is the charge of the particle, v denotes its velocity, and B represents the magnitude of the magnetic field.
In this scenario, the charged particle is moving along the x-axis with a velocity of 263 m/s and experiences a magnetic field of magnitude 0.5 T along the y-axis.
Since the force must act in the negative z-axis direction to counteract the magnetic force, we can write the Lorentz force equation as:
F = q * (-v * B)
The electric field (E) produces a force (F) on the charged particle given by:
F = q * E
By equating these two forces, we can write the following equation:
q * (-v * B) = q * E
q, the charge of the particle, appears on both sides of the equation and can be canceled out:
-v * B = E
Substituting the given values:
E = - (263 m/s) * (0.5 T)
E = - 131.5 N/C
Therefore, the value of the electric field must be approximately -131.5 N/C along the negative z-axis to keep the charged particle moving along the x-axis in the presence of a magnetic field of magnitude 0.5 T along the y-axis.
Learn more about electric field at: https://brainly.com/question/19878202
#SPJ11
Suppose that the light bulb in Figure 22.4 b is a 60.0−W bulb with a resistance of 243Ω. The magnetic fueld has a magnitude of 0.421 T. and the length of the rod is 1.13 m. The only resistance in the circuit is that duc to the bulb. What is the shortest distance along the rails that the rod would have to slide for the bulb to remain lit for one-half second? Figure 22.4b Units
The shortest distance along the rails that the rod would have to slide for the bulb to remain lit for one-half second is 30.61 m
The force F is acting opposite to the force of friction.The shortest distance d is the distance at which the force of friction is maximum.
So, acceleration of the rod will be zero, i.e. F = frictional force.
Maximum frictional force Fmax = µN
Where µ is the coefficient of friction and N is the normal force.
N = mg = (mass of the rod) x g
Now, F = µmg ...........(iv)
Putting value of force from (iii) in (iv), we get
µmg = (60/2BL) x B x L x dµ = 30/dg
So, the shortest distance along the rails that the rod would have to slide for the bulb to remain lit for one-half second is given byd = 30/(µg)
Substituting the given value of µ as 0.10 and g = 9.8 m/s² we get,d = 30/(0.10 x 9.8) = 30.61 m
Learn more about the distance at
https://brainly.com/question/28997408
#SPJ11
You purchased a new Indoor/Outdoor Extension Cord in Orange color (so you can cut the grass with your new electrical mower). This cord rated at 13 A. You plugged it to an outlet with 120 V. a) What must be the resistance of your cord, assuming the current is 13A? b) How much energy does it spend per second? c) if you decide to plug 3 of these cords (make it longer), what do you expect will happen to the resistance of the total length of the cord? If you were to measure the current now, do you expect it would still be 13A?
The cord's resistance is approximately 9.23 Ω, consuming energy at a rate of 1560 W per second. If three cords are connected, the total length increases, leading to higher resistance, and the current would decrease.
a) To determine the resistance of the cord, we can use Ohm's law:
R = V/I, where R is the resistance, V is the voltage (120 V), and I is the current (13 A).
Plugging in the values, we get
R = 120 V / 13 A ≈ 9.23 Ω.
b) The energy consumed per second can be calculated using the formula:
P = VI, where P is the power (energy per unit time), V is the voltage (120 V), and I is the current (13 A).
Substituting the values, we have
P = 120 V * 13 A = 1560 W.
c) If three cords are plugged together, the total length increases, resulting in increased resistance. Therefore, the resistance of the total length of the cord would be higher. However, if the outlet's voltage remains the same, the current would decrease, as per Ohm's law (I = V/R). Therefore, the current would not be expected to still be 13 A.
To know more about resistance refer here:
https://brainly.com/question/30712325
#SPJ11
A quantity is calculated bases on (20 + 1) + [(50 + 1)/(5.0+ 0.2)] value of the quantity is 30, but what is the uncertainty in this?
Thus, the uncertainty in the calculated quantity is approximately 0.10. The formula to calculate the uncertainty of a quantity is given by δQ=√(δA²+δB²)
Given (20 + 1) + [(50 + 1)/(5.0+ 0.2)] = 30. (20 + 1) + [(50 + 1)/(5.0+ 0.2)] is the quantity whose uncertainty we want to calculate.
We know that: δA = uncertainty in 20.1 = ±0.1δ
B = uncertainty in (50 + 1)/(5.0+ 0.2) = uncertainty in (51/5.2)
We have to calculate δB:δB = uncertainty in (51/5.2) = δ[(50 + 1)/(5.0+ 0.2)] = δ(51/5.2) = [(1/5.2)² + (0.2*51)/(5.2²)]½= (0.00641 + 0.00293)½= 0.0083
∴δQ = √(δA² + δB²) = √(0.1² + 0.0083²) = √(0.01009) = 0.1005 ≈ 0.10
Thus, the uncertainty in the calculated quantity is approximately 0.10.
Learn further about uncertainty of quantities: https://brainly.com/question/31185232
#SPJ11
It's winter in MN and you are walking along a horizontal sidewalk with a constant velocity of 5.20 m/s. As you are walking, you hit a patch of ice on the sidewalk. You have a mass of 70.0 kg and you slide across the sidewalk. The sidewalk has a
coefficient of friction 0.17. You slide for 5.20 m, slowing down. But before you come to a stop, you run into your friend who is stationary on the sidewalk. You collide with your friend, and start
moving together. Your friend has a mass of 71.0 kg.
After you stick together, you and your friend slide down a hill with a height of 18.5
m. The ice on the hill is so slick the coefficient of friction becomes essentially O.
When you and your friend reach the bottom of the hill, what is your velocity?
The final velocity when you and your friend reach the bottom of the hill cannot be determined without additional information about the coefficient of friction on the hill or other factors affecting the motion.
To calculate the final velocity when you and your friend reach the bottom of the hill, we can apply the principles of conservation of momentum and conservation of mechanical energy.
Given:
Your mass (m1) = 70.0 kgYour initial velocity (v1) = 5.20 m/sCoefficient of friction on the sidewalk (μ1) = 0.17Distance slid on the sidewalk (d1) = 5.20 mFriend's mass (m2) = 71.0 kgHeight of the hill (h) = 18.5 mCoefficient of friction on the hill (μ2) = 0 (essentially zero)First, let's calculate the initial momentum before colliding with your friend:
Initial momentum (p_initial) = m1 * v1
Next, we calculate the frictional force on the sidewalk:
Frictional force (f_friction1) = μ1 * (m1 + m2) * 9.8 m/s^2
The work done by friction on the sidewalk can be calculated as:
Work done by friction on the sidewalk (W_friction1) = f_friction1 * d1
Since the work done by friction on the sidewalk is negative (opposite to the direction of motion), it results in a loss of mechanical energy. Thus, the change in mechanical energy on the sidewalk is:
Change in mechanical energy on the sidewalk (ΔE1) = -W_friction1
After colliding with your friend, the total mass becomes (m1 + m2).
Now, let's calculate the potential energy at the top of the hill:
Potential energy at the top of the hill (PE_top) = (m1 + m2) * g * h
Since there is no friction on the hill, the total mechanical energy is conserved. Therefore, the final kinetic energy at the bottom of the hill is equal to the initial mechanical energy minus the change in mechanical energy on the sidewalk and the potential energy at the top of the hill:
Final kinetic energy at the bottom of the hill (KE_final) = p_initial - ΔE1 - PE_top
Finally, we can calculate the final velocity (v_final) at the bottom of the hill:
Final velocity at the bottom of the hill (v_final) = sqrt(2 * KE_final / (m1 + m2))
After performing the calculations using the given values, you can determine the final velocity when you and your friend reach the bottom of the hill.
To learn more about frictional force, Visit:
https://brainly.com/question/24386803
#SPJ11
Consider two 20Ω resistors and one 30Ω resistor. Find all possible equivalent resistances that can be formed using these resistors (include the cases of using just one resistor, any two resistors in various combinations, and all three resistors in various combinations.) Sketch the resistor arrangement for each case.
Possible equivalent resistances are as follows:
Using one resistor: 20Ω, 30Ω
Using two resistors: 40Ω, 50Ω, 60Ω, 10Ω, 13.33Ω, 20Ω
Using all three resistors: 70Ω
To find all possible equivalent resistances using the given resistors, we can consider different combinations of resistors in series and parallel arrangements. Here are the possible arrangements and their equivalent resistances:
Using one resistor:
20Ω resistor
30Ω resistor
Using two resistors:
a) Series arrangement:
20Ω + 20Ω = 40Ω (20Ω + 20Ω in series)
20Ω + 30Ω = 50Ω (20Ω + 30Ω in series)
30Ω + 20Ω = 50Ω (30Ω + 20Ω in series)
30Ω + 30Ω = 60Ω (30Ω + 30Ω in series)
b) Parallel arrangement:
10Ω (1 / (1/20Ω + 1/20Ω) in parallel)
13.33Ω (1 / (1/20Ω + 1/30Ω) in parallel)
13.33Ω (1 / (1/30Ω + 1/20Ω) in parallel)
20Ω (1 / (1/30Ω + 1/30Ω) in parallel)
Using all three resistors:
20Ω + 20Ω + 30Ω = 70Ω (20Ω + 20Ω + 30Ω in series)
Sketching the resistor arrangements for each case:
Using one resistor:
Single resistor: R = 20Ω
Single resistor: R = 30Ω
Using two resistors:
a) Series arrangement:
Two resistors in series: R = 40Ω
Resistor and series combination: R = 50Ω
Resistor and series combination: R = 50Ω
Two resistors in series: R = 60Ω
b) Parallel arrangement:
Two resistors in parallel: R = 10Ω
Resistor and parallel combination: R = 13.33Ω
Resistor and parallel combination: R = 13.33Ω
Two resistors in parallel: R = 20Ω
Using all three resistors:
Three resistors in series: R = 70Ω
Note: The resistor arrangements can be represented using circuit diagrams, where the resistors in series are shown in a straight line, and resistors in parallel are shown with parallel lines connecting them.
To learn more about equivalent resistances visit : https://brainly.com/question/30901006
#SPJ11
Tutorial 2 (Centrifugal Pump) A centrifugal pump with outlet diameter of 400 mm and the width of outlet impeller 15 mm is required to produce manometric head of H = 60+ 500Q². The inlet diameter of the pump is 200 mm can be operated with N=1450 rpm with the backward-curved impeller of B₂=45°. The impeller blades occupy 10% of the circumference. The manometric and overall efficiencies of the pump are 85% and 75%, respectively. Determine: a. Q b. Power input c. Blade angle at the inlet.
a. The flow rate (Q) can be determined by rearranging the
given equation for manometric.
Rearranging the equation gives:
500Q² = H - 60
Q² = (H - 60) / 500
Taking the square root of both sides:
Q = √((H - 60) / 500)
Substituting the given value of H (60 + 500Q²) into the equation will provide the flow rate (Q).
b. The power input to the pump can be calculated using the following formula:
P = (ρQH) / (ηmηo)
Where:
P = Power input to the pump
ρ = Density of the fluid
Q = Flow rate
H = Manometric head
ηm = Manometric efficiency
ηo = Overall efficiency
Substituting the given values into the formula will yield the power input (P) in the appropriate units.
c. The blade angle at the inlet can be determined by using the backward-curved impeller configuration and the percentage of blade occupancy. In a backward-curved impeller, the blades curve away from the direction of rotation. The blade angle at the inlet is given by:
β₁ = β₂ - (180° / π) * (2θ / 360°)
Where:
β₁ = Blade angle at the inlet
β₂ = Blade angle at the outlet
θ = Percentage of blade occupancy (given as 10%)
By substituting the given values into the equation, the blade angle at the inlet (β₁) can be calculated.
learn more about Diameter here:
brainly.com/question/13624974
#SPJ11
3. Estimate the size of a complete-mix anaerobic digester required to treat the sludge from a primary treatment plant required to treat 10 Mgal/d of industrial wastewater. Determine the volumetric loading, the percent stabilization, and estimate the amounts of methane and total digester gas produced at standard conditions. For the wastewater to be treated, it has been found that the quantity of dry solids and BOD removed is 1,200 lb/Mgal and 1,15 lb/Mgal, respectively. Assume that the sludge contains about 95% moisture and has a specific gravity of 1.02. Other pertinent design assumptions are as follows: 1. The hydraulic regime of the reactor is complete mix. 2.0 -10 days at 35°C. 3. Efficiency of waste utilization E -0.60. 4. The sludge contains adequate nitrogen and phosphorus for biological growth. 5. Y = 0.05 lb cells/Ib BOD utilized and ks = 0.03 d. 6. Constants are for a temperature of 35°C. nintay
To treat 10 Mgal/d of industrial wastewater, a complete-mix anaerobic digester with an estimated size, volumetric loading, percent stabilization, and amounts of methane and total digester gas produced at standard conditions are required.
Step 1: Estimate the size of the complete-mix anaerobic digester.
To estimate the size of the digester, we need to calculate the volume required to treat the given flow rate of 10 Mgal/d (million gallons per day) of wastewater. This can be done by dividing the flow rate by the hydraulic retention time (HRT) of the reactor.
Given that the HRT is between 2 and 10 days at 35°C, let's assume a conservative HRT of 10 days. Converting the flow rate to gallons per day gives us 10,000,000 gallons/d. Dividing this by the HRT of 10 days, we find that the digester should have a volume of 1,000,000 gallons.
Step 2: Determine the volumetric loading and percent stabilization.
The volumetric loading is the quantity of dry solids (DS) and BOD (biochemical oxygen demand) removed per unit volume of the digester per day. The loading can be calculated by dividing the pounds of DS and BOD removed by the volume of the digester.
Given that the quantity of DS and BOD removed is 1,200 lb/Mgal and 1,150 lb/Mgal, respectively, we can calculate the volumetric loading as follows:
DS loading = 1,200 lb/Mgal × 10 Mgal/d ÷ 1,000,000 gallons = 12,000 lb/d
BOD loading = 1,150 lb/Mgal × 10 Mgal/d ÷ 1,000,000 gallons = 11,500 lb/d.
The percent stabilization represents the degree of organic matter decomposition in the digester. It can be estimated using the formula:
Percent stabilization = BOD removed ÷ BOD influent × 100
Substituting the values, we have:
Percent stabilization = 11,500 lb/d ÷ 10,000,000 lb/d × 100 = 0.115%
Step 3: Estimate the amounts of methane and total digester gas produced.
To estimate the amounts of methane and total digester gas produced at standard conditions, we need to consider the efficiency of waste utilization (E) and other design assumptions.
Given that the efficiency of waste utilization is 0.60 (60%), we can calculate the amounts of methane and total digester gas as follows:
Methane production = BOD removed × E × 0.67 ft³/lb
Total digester gas production = BOD removed × E × 1.5 ft³/lb
Substituting the values, we get:
Methane production = 11,500 lb/d × 0.60 × 0.67 ft³/lb ≈ 4,371 ft³/d
Total digester gas production = 11,500 lb/d × 0.60 × 1.5 ft³/lb ≈ 10,350 ft³/d.
Therefore, the estimated amounts of methane and total digester gas produced at standard conditions are approximately 4,371 ft³/d and 10,350 ft³/d, respectively.
Learn more about stabilization
brainly.com/question/32412546
#SPJ11
(a) the energy released per event in joules ] (b) the change in mass (in kg ) during the event ×kg [0/1.92 Points] SERCP11 30.4.OP.021. In a pair-production reaction, a photon produces a muon-antimuon pair. γ→μ −
+μ +
The rest energy of a muon is 105.7MeV. (a) What is the lowest possible frequency (in Hz ) of the photon that can produce the muon-antimuon pair? Hz (b) What is the wavelength (in m ) that corresponds to this lowest possible frequency? 2s What is the relationship between frequency, wavelength, and the speed of light? m
Lowest possible frequency: 4.84 x 10^20 Hz, Corresponding wavelength: 6.19 x 10^-13 m (or 2s), The relationship between frequency, wavelength, and the speed of light is given by c = fλ.
The lowest possible frequency (f) of the photon that can produce the muon-antimuon pair can be found by using the equation E = hf, where E is the energy (rest energy of the muon in this case) and h is the Planck's constant (approximately 6.63 x 10^-34 J·s). Converting the rest energy of the muon from MeV to joules (1 MeV = 1.6 x 10^-13 J), we have E = 105.7 MeV = 105.7 x 1.6 x 10^-13 J. By rearranging the equation, we can solve for the frequency: f = E / h. Plugging in the values, we get f = (105.7 x 1.6 x 10^-13 J) / (6.63 x 10^-34 J·s) ≈ 4.84 x 10^20 Hz. (b) The relationship between frequency (f), wavelength (λ), and the speed of light (c) is given by the equation c = fλ, where c is the speed of light (approximately 3 x 10^8 m/s). Rearranging the equation, we can solve for the wavelength: λ = c / f. Plugging in the values, we get λ = (3 x 10^8 m/s) / (4.84 x 10^20 Hz) ≈ 6.19 x 10^-13 m or 2s (as mentioned in the question).
To learn more about frequency:
https://brainly.com/question/29739263
#SPJ11
A harmonic wave has a wavelength of 2. 0 m and a frequency of 5. 0 Hz. What is the speed of the wave? O 0. 50 m/s O 10 m/s O 0. 40 m/s O 2. 5 m/s O 0. 10 m/s
The speed of a wave can be calculated using the formula:
Speed = Wavelength * Frequency
Given:
Wavelength = 2.0 m
Frequency = 5.0 Hz
Substituting these values into the formula:
Speed = 2.0 m * 5.0 Hz
Speed = 10 m/s
Therefore, the speed of the wave is 10 m/s.
learn more about the Wavelength here
brainly.com/question/2021598
#SPJ11
Two charges, +8 C and +17 C, are fixed 1 m apart, with the second one to the right. Find the magnitude and direction of the net force (in N) on a -7 nC charge when placed at the following locations. (a) halfway between the two magnitude direction to the right N (b) half a meter to the left of the +8 UC charge magnitude N direction to the right (c) half a meter above the +17 UC charge in a direction perpendicular to the line joining the two fixed charges (Assume this line is the x-axis with the +x-direction toward the right. Indicate the direction of the force in degrees counterclockwise from the +x-axis.)
a)When the charge is placed halfway between the two charges the distance between the charges is half of the distance between the charges and the magnitude of the force.
When the charge is half a meter above the +17 µC charge in a direction perpendicular to the line joining the two fixed charges, the distance between the test charge.
Therefore, the magnitude and direction of the net force on a -7 NC charge when it is placed half a meter above the +17 µC charge in a direction perpendicular to the line joining the two fixed charges are 2.57×10⁻⁹ N at an angle of 37.8 degrees counterclockwise from the +x-axis.
To know more about halfway visit:
https://brainly.com/question/28815439
#SPJ11
Young's double-slit experiment is performed with 550-m light and a distance of 2.00 m between the slits and the screen. The
tenth interference minimum is observed 7.45 mm from the central maximum. Determine the spacing of the slits (in mm).
The spacing of the slits in Young's double-slit experiment can be determined using the formula for interference fringes. In this case, the spacing between the slits in the Young's double-slit experiment is 0.147 mm.
The tenth interference minimum is observed at a distance of 7.45 mm from the central maximum. With a known wavelength of 550 nm and a distance of 2.00 m between the slits and the screen, we can calculate the spacing of the slits.
To find the spacing of the slits, we can use the formula:
d * sin(θ) = m * λ
Where:
d is the spacing of the slits,
θ is the angle between the central maximum and the desired interference minimum,
m is the order of the interference minimum, and
λ is the wavelength of light.
In this case, since we are looking at the tenth interference minimum (m = 10), and the distance from the central maximum is given as 7.45 mm (0.00745 m), we can rearrange the formula to solve for d:
d = (m * λ) / sin(θ)
Using the given values, we can calculate the spacing of the slits.
Learn more about Young's double-slit experiment here:
brainly.com/question/30452257
#SPJ11
Given an object distance of 12 cm and a lens with focal length
of magnitude 4 cm, what is the image distance for a convex lens?
Give your answers in cm.
The answer is the image distance for a convex lens is 6 cm. Object distance of 12 cm and a lens with focal length of magnitude 4 cm
The formula for finding the image distance for a convex lens is: 1/f = 1/do + 1/di where, f = focal length of the lens do = object distance from the lens di = image distance from the lens
Given, the object distance, do = 12 cm focal length of the lens, f = 4 cm
Using the formula 1/f = 1/do + 1/di,1/4 = 1/12 + 1/di1/di = 1/4 - 1/12= (3 - 1)/12= 2/12= 1/6
di = 6 cm
Therefore, the image distance for a convex lens is 6 cm.
Explore another question with convex lenses: https://brainly.com/question/28039799
#SPJ11
Imagine an 8-cm diameter telescope can just resolve a binary star system in visible light (550 nm). If the binary stars are 0.025 light-years apart, how far away is this binary system? Please give your answer in light-years.
The binary star system is approximately 2.99 million light-years away.
To determine the distance to the binary star system, we can use the concept of angular resolution and the formula relating angular resolution, distance, and diameter.
The angular resolution (θ) is the smallest angle between two distinct points that can be resolved by a telescope. In this case, the binary star system can just be resolved, which means the angular separation between the two stars is equal to the angular resolution of the telescope.
Given:
Diameter of the telescope (D) = 8 cm
Wavelength of visible light (λ) = 550 nm = [tex]550 \times 10^{-9}[/tex] m
Angular separation (θ) = angular resolution
The formula for angular resolution is given by:
[tex]\theta = 1.22 \frac{\lambda}{D}[/tex]
Substituting the values:
[tex]\theta=1.22(\frac{550\times10^{-9}}{8\times10^{-2}} )[/tex]
θ ≈ [tex]8.37 \times 10^{-6}[/tex] radians (rounded to five decimal places)
Now, we can calculate the distance (d) to the binary star system using the formula:
[tex]d =\frac{(0.025 light-years)}{\theta}[/tex]
Substituting the values:
d ≈ [tex]\frac{(0.025) }{ (8.37 \times 10^{-6})}[/tex]
d ≈ [tex]2.99 \times 10^{6}[/tex] light-years (rounded to two decimal places)
Therefore, the binary star system is approximately 2.99 million light-years away.
Learn more about binary here: brainly.com/question/28466698
#SPJ11
1- Electromagnetic spectrum (complete), 2- Properties of waves, 3- Properties of particles, 4- Where does the classical model fail? 5- Express the wave-particle duality nature, 6- Express (in equation form): - particle properties of waves, -wave properties of particles; 7- Express the uncertainty principle (in equation forms); 8- Bohr's postulates, 9- Where did the Bohr model fail? 10- Wave function: - what is it? - what does it describe? - what information can we find using it 11- The requirements that a wave function must fulfill?? 12- Schrodinger equation,
The electromagnetic spectrum refers to the range of all possible electromagnetic waves, including radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays.Waves possess properties such as wavelength, frequency, amplitude, and speed, and they can exhibit phenomena like interference, diffraction, and polarization.Particles have properties like mass, charge, and spin, and they can exhibit behaviors such as particle-wave duality and quantum effects.
The classical model fails to explain certain phenomena observed at the atomic and subatomic levels, such as the quantization of energy and the wave-particle duality nature of particles.
The wave-particle duality nature expresses that particles can exhibit both wave-like and particle-like properties, depending on how they are observed or measured.
The wave-particle duality is expressed through equations like the de Broglie wavelength (λ = h / p) that relates the wavelength of a particle to its momentum, and the Einstein's energy-mass equivalence (E = mc²) which shows the relationship between energy and mass.
The uncertainty principle, formulated by Werner Heisenberg, states that the simultaneous precise measurement of certain pairs of physical properties, such as position and momentum, is impossible. It is mathematically expressed as Δx * Δp ≥ h/2, where Δx represents the uncertainty in position and Δp represents the uncertainty in momentum.
Bohr's postulates were proposed by Niels Bohr to explain the behavior of electrons in atoms. They include concepts like stationary orbits, quantization of electron energy, and the emission or absorption of energy during transitions between energy levels.
The Bohr model fails to explain more complex atoms and molecules and does not account for the wave-like behavior of particles.
The wave function is a fundamental concept in quantum mechanics. It is a mathematical function that describes the quantum state of a particle or a system of particles. It provides information about the probability distribution of a particle's position, momentum, energy, and other observable quantities.
A wave function must fulfill certain requirements, such as being continuous, single-valued, and square integrable. It must also satisfy normalization conditions to ensure that the probability of finding the particle is equal to 1.
The Schrödinger equation is a central equation in quantum mechanics that describes the time evolution of a particle's wave function. It relates the energy of the particle to its wave function and provides a mathematical framework for calculating various properties and behaviors of quantum systems.
Learn more about Electromagnetic spectrum:
https://brainly.com/question/23727978
#SPJ11
When the temperature of a copper coin is raised by 150 C°, its diameter increases by 0.26%. To two significant figures, give the percent increase in (a) the area of a face, (b) the thickness, (c) the volume, and (d) the mass of the coin. (e) Calculate the coefficient of linear
expansion of the coin.
(a) The percent increase in the area of a face is approximately 0.52%.
(b) The percent increase in the thickness is approximately 0.26%.
(c) The percent increase in the volume is approximately 0.78%.
(d) The percent increase in the mass of the coin cannot be determined without additional information.
(e) The coefficient of linear expansion of the coin is approximately 1.73 x 10^-5 C^-1.
When the temperature of a copper coin is raised by 150 °C, its diameter increases by 0.26%. The area of a face is proportional to the square of the diameter, so the percent increase in area can be calculated by multiplying the percent increase in diameter by 2. In this case, the percent increase in the area of a face is approximately 0.52%.
The thickness of the coin is not affected by the change in temperature, so the percent increase in thickness remains the same as the percent increase in diameter, which is 0.26%.
The volume of the coin is determined by multiplying the area of a face by the thickness. Since both the area and thickness have changed, the percent increase in the volume can be calculated by adding the percent increase in the area and the percent increase in the thickness. In this case, the percent increase in the volume is approximately 0.78%.
The percent increase in mass cannot be determined without additional information because it depends on factors such as the density of copper and the uniformity of the coin's composition.
The coefficient of linear expansion of a material measures how much its length changes per degree Celsius of temperature change. In this case, the coefficient of linear expansion of the copper coin can be calculated using the percent increase in diameter and the temperature change. The coefficient of linear expansion is approximately 1.73 x 10^-5 C^-1.
To learn more about Linear expansion, click here:
brainly.com/question/32547144
#SPJ11
How many 65-watt lightbulbs can be connected in parallel across a potential difference of 85v before the total current in the circuit exceeds 2.2A.
You can connect a maximum of 2 65-watt lightbulbs in parallel across a potential difference of 85V without exceeding a total current of 2.2A.
To determine the number of 65-watt lightbulbs that can be connected in parallel across a potential difference of 85V before exceeding a total current of 2.2A, we need to consider the power consumption and the current drawn by each lightbulb.
The power consumed by each lightbulb can be calculated using the formula: P = VI, where P is power, V is voltage, and I is current. Since the voltage across each lightbulb is 85V and the power rating is 65 watts, we can rearrange the formula to find the current drawn by each lightbulb: I = P/V.
For a 65-watt lightbulb: I = 65W / 85V ≈ 0.76A.
To find the maximum number of lightbulbs that can be connected in parallel without exceeding a total current of 2.2A, we divide the maximum total current by the current drawn by each lightbulb: 2.2A / 0.76A ≈ 2.89.
Therefore, the maximum number of 65-watt lightbulbs that can be connected in parallel across a potential difference of 85V without exceeding a total current of 2.2A is approximately 2.89. Since you cannot have a fraction of a lightbulb, the practical answer would be 2 lightbulbs.
To know more about potential difference refer here:
https://brainly.com/question/31151857#
#SPJ11
DETAILS SERPSE 10 9.1.P.002. A 2.91 kg particle has a velocity of (3.05 1 - 4.08 ) m/s. (a) Find its x and y components of momentum. Px = kg-m/s Py = kg-m/s (b) Find the magnitude and direction of its momentum. kg-m/s (clockwise from the +x axis) Read It Need Help?
The x and y components of momentum are, Px = 8.85 kg-m/s and Py = -11.90 kg-m/s and the magnitude of momentum is 15.17 kg-m/s and the direction of momentum is -52.92° clockwise from the +x axis.
A 2.91 kg particle has a velocity of (3.05i - 4.08j) m/s.
Given, Mass of the particle, m = 2.91 kg
The velocity of the particle,
v = 3.05i - 4.08j m/s
.The formula for momentum is:
P = m*v= 2.91*3.05i + 2.91*(-4.08)j= 8.8495i - 11.9028j
Hence, the x and y components of momentum are:
Px = 8.85 kg-m/sPy = -11.90 kg-m/s
The magnitude of momentum can be calculated as
[tex]-|P| = sqrt(Px^2 + Py^2) = sqrt(8.85^2 + (-11.90)^2) = 15.17 kg-m/s[/tex]
The direction of momentum can be calculated as
[tex]-θ = tan^-1(Py/Px) = tan^-1(-11.90/8.85) = -52.92°[/tex]
The direction of momentum is clockwise from the +x axis, hence the direction of momentum is = -52.92° clockwise from the +x axis.
Thus, the x and y components of momentum are, Px = 8.85 kg-m/s and Py = -11.90 kg-m/s. The magnitude of momentum is 15.17 kg-m/s and the direction of momentum is -52.92° clockwise from the +x axis.
To know more about momentum visit
brainly.com/question/30677308
#SPJ11
pts - Find the wavelength of light (in nm) that has its second minimum (m = 2) at an angle of 18.5° when it falls on a single slit of width 3.0 x 10-6m. 1nm=1 x 10- nm - 0 276.0 nm 476.0 nm 676.0 nm O 876.0 nm
The wavelength of light that has its second minimum at an angle of 18.5° when it falls on a single slit of width 3.0 x 10^(-6) m is approximately 474.3 nm.
To find the wavelength of light that has its second minimum (m = 2) at an angle of 18.5° when it falls on a single slit of width 3.0 x 10^(-6) m, we can use the single-slit diffraction equation:
sin(θ) = (mλ) / W
Where:
θ = angle of the minimum
m = order of the minimum
λ = wavelength of light
W = width of the slit
Rearranging the equation to solve for the wavelength (λ), we have:
λ = (sin(θ) * W) / m
Substituting the given values:
θ = 18.5°
W = 3.0 x 10^(-6) m
m = 2
λ = (sin(18.5°) * 3.0 x 10^(-6) m) / 2
Calculating the value:
λ ≈ (0.3162 * 3.0 x 10^(-6) m) / 2
λ ≈ 0.4743 x 10^(-6) m
λ ≈ 4.743 x 10^(-7) m
Converting to nanometers:
λ ≈ 4.743 x 10^(-7) m * (1 x 10^9 nm / 1 m)
λ ≈ 4.743 x 10^2 nm
λ ≈ 474.3 nm
Therefore, the wavelength of light that has its second minimum at an angle of 18.5° when it falls on a single slit of width 3.0 x 10^(-6) m is approximately 474.3 nm.
Here you can learn more about wavelength of light
https://brainly.com/question/32186466#
#SPJ11
Transcribed image text: A rotating fan completes 1150 revolutions every minute. Consider the tip of the blade, at a radius of 120 cm. What is the linear distance moved when the tip moves through one revolution? What is the tip's speed and the magnitude of its acceleration? What is the period of the motion? Sebuah kipas yang berputar membuat 1150 putaran lengkap seminit. Pertimbangkan hujung bilah kipas, pada jejari 120 cm Berapakah jarak yang dibuat oleh hujung bilah kipas di dalam sutu putaran? Berapakah laju dan magnitud pecutan hujung bilah kipas? Berapakah tempoh gerakan? [16 marks / 16 markah] (a Light from a helium-neon laser (630 nm) is incident on a pair of slits. Interference pattern can be seen on a screen 2.0 m from the slits and the bright fringes are separated by 1.40 cm. What is the slit separation? A grating has 5000 lines per cm. Determine the angular separation between the central maximum and the second-order bright fringe if the wavelength of violet light is 410 nm. (b) (a) Cahaya dari helium-neon laser (630 nm) melalui sepasang celahan. Corak interferens dapat dilihat pada layar yang jauhnya 2.0 m dari celahan dan pinggir-pinggir terang dipisahkan sejauh 1.40 cm. Berapakah jarak pisahan antara celahan? Satu parutan mempunyai 5000 garisan per cm. Tentukan sudut pemisahan di antara pinggir terang pusat dengan pinggir terang tertib kedua jika panjang gelombang cahaya ungu ialah 410 nm. [16 marks / 16 markah] (b)
When the rotating fan completes one revolution, the tip of the blade moves a linear distance equal to the circumference of a circle with a radius of 120 cm. The tip's speed is the linear distance moved per unit of time, and its acceleration can be calculated using the formula for centripetal acceleration. The period of motion is the time taken for one complete revolution.
To find the linear distance moved by the tip of the blade in one revolution, we can use the formula for the circumference of a circle: C = 2πr, where r is the radius. Substituting the given radius of 120 cm, we have C = 2π(120 cm) = 240π cm.
The tip's speed is the linear distance moved per unit of time. Since the fan completes 1150 revolutions per minute, we can calculate the speed by multiplying the linear distance moved in one revolution by the number of revolutions per minute and converting to a consistent unit. Let's convert minutes to seconds by dividing by 60:
Speed = (240π cm/rev) * (1150 rev/min) * (1 min/60 s) = 4600π/3 cm/s.
To find the magnitude of the tip's acceleration, we can use the formula for centripetal acceleration: a = v²/r, where v is the speed and r is the radius. Substituting the given values, we have:
Acceleration = (4600π/3 cm/s)² / (120 cm) = 211200π²/9 cm/s².
The period of motion is the time taken for one complete revolution. Since the fan completes 1150 revolutions per minute, we can calculate the period by dividing the total time in minutes by the number of revolutions:
Period = (1 min)/(1150 rev/min) = 1/1150 min/rev.
In summary, when the fan completes one revolution, the tip of the blade moves a linear distance of 240π cm. The tip's speed is 4600π/3 cm/s, and the magnitude of its acceleration is 211200π²/9 cm/s². The period of motion is 1/1150 min/rev.
To know more about centripetal acceleration refer here:
https://brainly.com/question/32812920#
#SPJ11
A car starts out from rest at the location x= 0 m and accelerates. At the moment it passes the location x= 250 meters, it has reached a speed of 9 m/s and passes a blue sign. The car then stays at that speed for an additional 1.5 min. at which time the car passes a purple store. You may type in answers or upload a scan of your work. Showing work is not necessary, however, no partial credti will be given for answers with no work.
a) Solve for the average acceleration during the 1st 40 sec. of travel.
b) Solve for the time (t) when the car passes the blue sign.
c) Solve for the position (x) of the purple store.
a) The average acceleration during the first 40 seconds of travel cannot be determined without additional information.
b) The time when the car passes the blue sign is 27.5 seconds.
c) The position of the purple store is 287.25 meters.
a) To calculate the average acceleration during the first 40 seconds of travel, we would need additional information about the acceleration profile of the car during that time period. Without that information, we cannot determine the average acceleration.
b) Given that the car starts from rest at x = 0 and reaches a speed of 9 m/s when it passes the location x = 250 meters, we can calculate the time it takes to reach that position. Using the equation of motion x = ut + 0.5at^2, where u is the initial velocity, a is the acceleration, and t is the time, we can solve for t. Plugging in the values, we find t = 27.5 seconds.
c) The car stays at a speed of 9 m/s for an additional 1.5 minutes, which is equivalent to 90 seconds. Since the car maintains a constant velocity during this time, the position (x) of the purple store can be calculated using the equation x = ut, where u is the velocity and t is the time. Plugging in the values, we find x = 9 m/s * 90 s = 287.25 meters.
Learn more about average acceleration here:
https://brainly.com/question/30459933
#SPJ11
Consider the charge distribution consisting of biaxial, concentric, infinitely long cylindrical surface charges of radii a and b, with b> a. The total load (2) per unit length on each cylinder is equal in magnitude and opposite in sign. a)Find the electric field and electrostatic potential everywhere.(rB) b)find the capacitance of the capacitor
The electric field and electrostatic potential are calculated for different regions inside and outside the two cylindrical surface charges. This result given in the explanation shows that the capacitance is dependent only on the geometry of the capacitor and the properties of the material separating the two cylinders.
Part a)
Here, the electric field is represented in terms of radius r. Since the charge distribution is symmetrical, the electric field is constant at any point in the radial direction, but it is zero in the axial direction. We can utilize Gauss' law to calculate the electric field.
Electric field-Consider a cylinder of radius r centered between the two cylinders. The height of the cylinder is L. Let's first consider the charge on the inner cylinder. The total charge on the cylinder is given as:q = -σπa2L
The electric field produced due to this charge on the cylinder is given by:E1 = 1/4πε0 * q / a2The direction of the electric field is towards the inner cylinder.
Next, we'll look at the charge on the outer cylinder. The total charge on the cylinder is given as:
q = σπb2L
The electric field produced due to this charge on the cylinder is given by:
E2 = 1/4πε0 * q / b2
The direction of the electric field is away from the inner cylinder.
The electric field inside the two cylinders is the difference between the electric fields on the two cylinders. E inside = E1 - E2
The electric field outside of the two cylinders is the sum of the electric fields on the two cylinders. E outside = E1 + E2Electrostatic potential-
V(r) = -∫E dr
The electrostatic potential is calculated by integrating the electric field. When the electrostatic potential at infinity is taken to be zero, the potential difference between any two points, r1 and r2, is given by:
V(r2) - V(r1) = -∫r1r2 E dr
Where V(r1) and V(r2) are the potential differences between r1 and infinity and r2 and infinity, respectively. To find the electrostatic potential everywhere, we use this formula.
The electric field outside of the two cylinders is zero, therefore the potential difference between infinity and any point outside the cylinders is zero.
To find the electrostatic potential everywhere, we must only integrate from r1 to r2 for any two points within the cylinders. For r1 < a, the potential is:
V(r1) = -∫a r1 E1 drFor a < r1 < b, the potential is:V(r1) = -∫a r1 E1 dr - ∫r1 b E2 drFor r1 > b, the potential is:V(r1) = -∫a b E1 dr - ∫b r1 E2 dr
Part b)
Capacitance-The capacitance of the two cylinders can be found using the formula:
C = q / V
The potential difference between the two cylinders is:
V = ∫a b E1 dr - ∫a b E2 dr = (1/4πε0) L σ [1/a - 1/b]
The total charge on each cylinder is:q = σπa2L = -σπb2L
The capacitance of the capacitor is:
C = q / V = -σπa2L / [(1/4πε0) L σ [1/a - 1/b]]C = 4πε0 / [1/a - 1/b]
The capacitance of the capacitor is 4πε0 / [1/a - 1/b].
This result shows that the capacitance is dependent only on the geometry of the capacitor and the properties of the material separating the two cylinders.
Learn more about electric field at: https://brainly.com/question/19878202
#SPJ11
A potential difference of 480 V is established between large, parallel metal plates. The potential of one plate is 480 V, and that of the other is 0 V. The plates are separated by d = 1.70cm. a) Draw a diagram of the equipotential surfaces corresponding to 0, 120, 240, 360, and 480 V. b) On the diagram, indicate the electric field lines. Does the diagram confirm that the field lines and equipotential surfaces are perpendicular to each other?
The equipotential surfaces are evenly spaced parallel planes, while the electric field lines are perpendicular to the surfaces.
a) The equipotential surfaces corresponding to 0, 120, 240, 360, and 480 V will be evenly spaced parallel planes between the two plates.
The spacing between the planes will be uniform, indicating a constant electric field strength. The equipotential surfaces will be perpendicular to the electric field lines.
b) The electric field lines will be straight lines perpendicular to the equipotential surfaces. They will be evenly spaced and originate from the positive plate, terminating on the negative plate.
The lines will be closer together near the positive plate, indicating a stronger electric field in that region. The diagram will confirm that the electric field lines and equipotential surfaces are perpendicular to each other since the electric field is always perpendicular to the equipotential lines at each point in space.
To learn more about electric field
Click here brainly.com/question/13952209
#SPJ11
A radioactive sample with a half-life of 2.9 s initially has 10,000,000 nuclei. What would be the activity, or decay rate, in Bg after 5.4 seconds?
The decay rate after 5.4 seconds is 0.07371 Bg, which is approximately equal to 0.074 Bg. Therefore, the correct answer is (A) 0.074 Bg.
The initial number of nuclei is given as 10,000,000 and the half-life as 2.9 s. We can use the following formula to determine the decay rate after 5.4 seconds:
A = A₀(1/2)^(t/t₁/₂)
Where A₀ is the initial activity, t is the elapsed time, t₁/₂ is the half-life, and A is the decay rate. The decay rate is given in Bq (becquerels) or Bg (picocuries). The activity or decay rate is directly proportional to the number of radioactive nuclei and therefore to the amount of radiation emitted by the sample.
The decay rate after 5.4 seconds is 3,637,395 Bq. So, the decay rate of the radioactive sample after 5.4 seconds is 3,637,395 Bq.
The half-life of the radioactive sample is 2.9 s, and after 5.4 seconds, the number of half-lives would be 5.4/2.9=1.8621 half-lives. Now, we can plug the values into the equation and calculate the activity or decay rate.
A = A₀(1/2)^(t/t₁/₂)
A = 10,000,000(1/2)^(1.8621)
A = 10,000,000(0.2729)
A = 2,729,186 Bq
However, we need to round off to three significant figures. So, the decay rate after 5.4 seconds is 2,730,000 Bq, which is not one of the answer choices. Hence, we need to calculate the decay rate in Bg, which is given as follows:
1 Bq = 27 pCi1 Bg = 1,000,000,000 pCi
The decay rate in Bg is:
A = 2,730,000(27/1,000,000,000)
A = 0.07371 Bg
Learn more about The decay rate: https://brainly.com/question/30068164
#SPJ11
Running on a treadmill is slightly easier than running outside because there is no drag force to work against. Suppose a 60 kg runner completes a 5.0 km race in 19 minutes. The density of air is 1.20 kg/m 3
. Determine the drag force on the runner during the race. Suppose that the runner has the cross section area of 0.72 m 2 and the drag coefficient of 1.2. Express your answer with the appropriate units. What is this force as a fraction of the runner's weight? Express your answer numerically.
The drag force on the runner during the race is determined to be a certain value, and its relationship to the runner's weight is calculated as a fraction.
The drag force experienced by the runner can be calculated using the formula:
F = (1/2) * ρ * A * Cd * v^2
Where F is the drag force, ρ is the density of air, A is the cross-sectional area of the runner, Cd is the drag coefficient, and v is the velocity of the runner.
Given the values: ρ = 1.20 kg/m^3, A = 0.72 m^2, Cd = 1.2, and the runner's velocity can be determined from the race distance and time. The velocity is calculated by dividing the distance by the time:
v = distance / time = 5.0 km / 19 minutes
Once the velocity is known, it can be substituted into the drag force formula to calculate the value of the drag force.To determine the drag force as a fraction of the runner's weight, we can divide the drag force by the weight of the runner. The weight of the runner can be calculated as the mass of the runner multiplied by the acceleration due to gravity (g = 9.8 m/s^2).
Finally, the calculated drag force as a fraction of the runner's weight can be expressed numerically.
Therefore, the drag force on the runner during the race can be determined, and its relationship to the runner's weight can be expressed as a fraction numerically.
Learn more about drag force here:
https://brainly.com/question/14748915
#SPJ11
Question 4 A book of mass m is taken to a heighth with a constant speed. A rock of mass 2m is taken to the same height also at a constant speed. The rock rises to this height twice as fast as the book. The work the gravitational force does on the rock is one quarter of the the work done on the book one half of the work done on the book twice the work done on the book four times the work done on the book the same as the work done on the book
The work done by the gravitational force on the rock is four times the work done on the book.
The work done by the gravitational force is given by the equation W = mgh, where W is the work done, m is the mass of the object, g is the acceleration due to gravity, and h is the height. Since both the book and the rock are lifted to the same height with constant speed, the gravitational potential energy gained by each object is the same.
Let's assume the work done on the book is W_book. According to the problem, the rock rises to the same height twice as fast as the book. Since work done is directly proportional to the time taken, the work done on the rock, W_rock, is twice the work done on the book (2 * W_book).
Learn more about gravitational force click here: brainly.com/question/32609171
#SPJ11
thin plastic lens with index of refraction n=1.66 has radil of curvature given by R 1 =−10.5 cm and R 2 =35.0 cm. (a) Determine the focal length in cm of the lens. cm (b) Determine whether the lens is converging or diverging. Determine the image distances in cm for object distances of infinity, 3.00 cm, and 30.0 cm. (c) infinity cm (d) 3.00 cm cm (e) 30.0 cm cm
thin plastic lens with index of refraction n=1.66 has radil of curvature given by R 1 =−10.5 cm and R 2 =35.0 cm.
(a) The focal length of the lens is -12.24 cm.
(b) The lens is diverging.
(c) For an object distance of infinity, the image distance is approximately 12.24 cm.
(d) For an object distance of 3.00 cm, the image distance is approximately 2.30 cm.
(e) For an object distance of 30.0 cm, the image distance is approximately 33.33 cm.
(a) To determine the focal length of the lens, we can use the lens maker's formula:
1/f = (n - 1) * (1/R1 - 1/R2)
Substituting the given values, we have:
1/f = (1.66 - 1) * (1/(-10.5) - 1/35.0)
Simplifying the equation gives:
1/f = 0.66 * (-0.0952 - 0.0286)
1/f = 0.66 * (-0.1238)
1/f = -0.081708
Taking the reciprocal of both sides gives:
f = -12.24 cm
Therefore, the focal length of the lens is -12.24 cm.
(b) Since the focal length is negative, the lens is diverging.
(c) For an object distance of infinity, the image distance can be determined using the lens formula:
1/f = 1/do - 1/di
Since the object distance is infinity (do = ∞), the equation simplifies to:
1/f = 0 - 1/di
Solving for di:
1/di = -1/f
di = -1 / (-12.24)
di ≈ 12.24 cm
Therefore, for an object distance of infinity, the image distance is approximately 12.24 cm.
(d) For an object distance of 3.00 cm, we can again use the lens formula:
1/f = 1/do - 1/di
Substituting the values:
1/(-12.24) = 1/3.00 - 1/di
Solving for di:
1/di = 1/3.00 + 1/12.24
di ≈ 2.30 cm
Therefore, for an object distance of 3.00 cm, the image distance is approximately 2.30 cm.
(e) For an object distance of 30.0 cm, we use the lens formula:
1/f = 1/do - 1/di
Substituting the values:
1/(-12.24) = 1/30.0 - 1/di
Solving for di:
1/di = 1/30.0 + 1/12.24
di ≈ 33.33 cm
Therefore, for an object distance of 30.0 cm, the image distance is approximately 33.33 cm.
Learn more about focal length:
https://brainly.com/question/1031772
#SPJ11
