The size of the pinhole is equal to the typical wavelength of sunlight (in nm) of 550 nm (in mm). D=0.402mm.
What wavelength is it?A waveform signal that is carried in space or down a wire has a wavelength, which is the separation between two identical places (subsequent crests) in the consecutive cycles. This length is typically defined in wireless systems in meters (m), centimetres (cm), or millimeters (mm) (mm).
What use does wavelength serve?The light's wavelength is a crucial characteristic since it establishes the nature of a light. Greens light has a wavelength that is different from both of them, while red light has a wavelength that is different from blue light.
Briefing:So the average wavelength
λavg= λ1+λ2/2
=400+700/2
=550nm
D=2.44λavgL/w
Where D=Diameter of pinhole
λ=Average wavelength
w=Central distance
L=length
D=2.44*550*10⁻⁹*3/0.01
D=0.402mm
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a 0.27-kg stone is held 1.2 m above the top edge of a water well and then dropped into it. the well has a depth of 5.2 m.
The answers to the questions are (a) 3.17J, (b) -13.75J, and (c) -16.7J, respectively.
What does it mean to have depth?The degree to which a person taking the appropriate, intellect, wisdom, insight, empathy, etc., as demonstrated by their actions or by some other mental product, such as a scholarly paper, argument, piece of art, etc. a substantial amount of such wisdom, understanding, etc. usually depths.
Briefing:Utilize U=mgy, wherein y is evaluated in relation to a standard. Here, y is calculated relative towards the well's top edge, where y is set to zero.
(a) y = 1.2m: U=mgy = (0.27kg)(9.80m/s²)(1.2m)=+3.17J
(b) y = –5.2m: U=mgy = (0.27kg)(9.80m/s²)(–5.2m) = −13.75J
(c) ΔU = Uf − Ui = (−13.75J)−(3.17J) = −16.92 = −17J
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sometimes it is said that water is removed from clothes in the spin dryer by centrifugal force throwing the water outward. is this correct? discuss
This statement is untrue. A pseudo force is centrifugal force. It's not true. Since there is a hole in the spin dryer's drum, there is nothing to cause the water to move in a circular motion or exert a high centripetal force.
What is a centrifugal force in simple words?The force that pushes an item rotating away from its axis of rotation is known as centrifugal force. The propensity of an object travelling in a circle to move away from the circle's center is known as centrifugal force. When viewed from a rotating frame of reference, the centrifugal force in Newtonian mechanics appears to act on every object. It is pointed away from the origin of the coordinate system, along an axis that is perpendicular to the axis of rotation.
Where is centrifugal force used?When rotating coordinate systems are used to analyze rotating objects, such as centrifuges, centrifugal pumps, centrifugal governors, and centrifugal clutches, as well as centrifugal railways, planetary orbits, and banked curves, the concept of centrifugal force can be applied.
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an ethernet cable is 3.90 m long and has a mass of 0.190 kg. a transverse pulse is produced by plucking one end of the taut cable. the pulse makes four trips down and back along the cable in 0.835 s. what is the tension in the cable?
One end of the taut cable is pulled, causing a transverse pulse to be created. In 0.835 seconds, the pulse travels four times down the cable and four times back then the tension in the ethernet cable is determined as 67 N.
It is given to us that -
Ethernet cable is 3.90 m long => l = 3.90 m
and has a mass of 0.190 kg => m = 0.190 kg
It is also given that the transverse pulse makes four trips down and back along the cable in 0.835 s.
=> time taken, t = 0.835 s
We have to find out the tension in the cable.
We know that
Speed = Distance/Time ----- (1)
Since the transverse pulse applied on the ethernet cable makes four trips down and back along the cable, the total distance travelled by the pulse = 4 * (2l)
Now, using equation (1) we can find out the speed of the pulse by -
[tex]v = \frac{4*2*3.90}{0.835} \\= > v = 37.36[/tex] m/s ---- (2)
We also know that the mass density of the pulse can be determined by the formula -
μ = [tex]\frac{m}{l}[/tex] ------ (3)
where,
m = mass of the cable
l = length of the cable
Substituting the given values of mass and length of the cable in equation (3), we can find out the mass density of the pulse as -
μ = [tex]\frac{m}{l} = \frac{0.190}{3.90} = 0.048[/tex] kg/m ------ (4)
We also know that the tension in the cable can be represented by the formula -
T = μ[tex]v^{2}[/tex] ----- (5)
Substituting the values of v and μ from equations (2) and (4) respectively, we can find out the tension in the cable as -
T = μ[tex]v^{2}[/tex]
=> T = 0.048 * [tex](37.36)^{2}[/tex]
=> T = 67 N
Thus, the tension in the ethernet cable is determined as 67 N.
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a student weighed a chunk of solid co2 as 1.82 gram. what is the gas-to-solid volume ratio if the sublimated chunk produced gaseous carbon dioxide with volume 0.85 liter at atmospheric pressure. the additional necessary datum is given in the text
A student weighed a chunk of solid carbon dioxide as 1.82 gram.[tex]\frac{0.85 L}{0.0011667 L}[/tex] (728.55 ) is the gas-to-solid volume ratio if the sublimated chunk produced gaseous carbon dioxide with volume 0.85 liter at atmospheric pressure.
What is atmospheric pressure?The air around you has weight, and it presses against everything it touches. That pressure is called atmospheric pressure, or air pressure. It is the force exerted on a surface by the air above it as gravity pulls it to Earth. Atmospheric pressure is commonly measured with a barometer.
How to calculate?density of [tex]CO_{2}[/tex] = 1.56g/[tex]cm^{3}[/tex]
density =[tex]\frac{mass}{volume}[/tex]
volume of solid [tex]CO_{2}[/tex]
[tex]\frac{1.56g}{1cm^{3} }[/tex]=[tex]\frac{1.82 g}{?}[/tex]
? = [tex]\frac{1.167 }{cm^{3} }[/tex]
volume of [tex]CO_{2}[/tex] from [tex]cm^{3}[/tex] to L
1 [tex]cm^{3}[/tex]= 1 mL
1.167[tex]cm^{3}[/tex] × [tex]\frac{1 mL }{ 1cm^{3} }[/tex]× [tex]\frac{1L}{1000mL}[/tex]= 0.0011667 L
Ratio: [tex]\frac{V gas}{V solid}[/tex]
([tex]\frac{0.85 L}{0.0011667 L}[/tex]) = 728.55
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suppose we want a satellite to revolve around the earth 7 times a day. what should the radius of its orbit be?
The radius of its orbit is 102.22 km
What is gravitational constant ?The proportionality constant utilized in Newton's Law of Gravitation is the gravitational constant. The universal gravitational constant, abbreviated G and measured in Nm2/kg2, is the gravitational force that attracts any two unit masses separated by a unit distance.
Earth's acceleration caused by gravity, or the magnitude of g, is 9.8 m/s2. According to this, an item falling freely on Earth would accelerate by 9.8 meters per second. The gravity of the Earth is to blame for this acceleration.
For this question, force caused by the satellite from the planet must be round about equal to the Centrifugal force :
[tex]F_{g} = F_{c[/tex]
[tex]\frac{GMm}{r^2}[/tex] = [tex]mw^2r[/tex]
where ;
G = gravitational constant and this value is constant = 6.67 × [tex]10^-^1^1[/tex]
m = mass of the earth and
r = distance
Using the concept of period through the angular velocity, we have
[tex]\frac{GM}{w^2}[/tex] = [tex]r^3[/tex]
Substitute the value and we will get
[tex]r^3[/tex] = 1068193.154
r = 102.22 km
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What are the two independent components of projectile motion?.
The two independent components of Projectile motion in 2D plane are horizontal and vertical.
Projectile motion is nothing but a form of motion experienced by an object or particle that is projected in a gravitational field, such as from Earth's surface, and moves along a curved path under the action of gravity only. It means the object is thrown from earth and due to the gravity object is again coming back to earth.
When object is moving up, the velocity it has can be derived into its components horizontally and vertically because velocity is a vector quantity.
V = Vx + Vy
where V is the resultant vector and Vx and Vy are the horizontal and vertical components of the velocity.
Hence the two independent components of Projectile motion in 2D plane are horizontal and vertical.
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kinematics can answer all of the following questions except what was the maximum speed of the baseball? how rapidly did the baseball slow down when it hit the ground? why does a baseball drop to the ground down after being thrown? how far did the baseball fly? in what direction did the baseball travel? next
kinematics can answer all the following questions except, Why does a baseball drop to the ground down after being thrown?
What are the objectives of kinematics?The goal of kinematics is to provide a description of the spatial positions of bodies or systems of material particles, as well as the speeds and velocities of those particles (acceleration). Motion descriptions are only conceivable for particles with limited motion, or particles travelling along predetermined pathways, when the causing forces are ignored. Forces control the path's form in unrestrained or free motion.A list of places and related times would make a good description of the motion of a particle travelling along a straight line. A mathematical equation that expresses position in terms of time would be necessary for a continuous description.To learn more about kinematics, refer to
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15.69 ... a sinusoidal transverse wave travels on a string. the string has length 8.00 m and mass 6.00 g. the wave speed is 30.0 m>s, and the wavelength is 0.200 m. (a) if the wave is to have an average power of 50.0 w, what must be the amplitude of the wave? (b) for this same string, if the amplitude and wave- length are the same as in part (a), what is the average power for the wave if the tension is increased such that the wave speed is doubled?
Amplitude of wave at power of 50 W is 7.07 cm and the average power of the wave after increasing the temperature 8 times the initial power.
(a) Length of the string (l) = 8 m
Mass of the string (m) = 6 g
Wavelength of the string (λ) = 0.2 m
Wave speed (v) = 30 m/s
Average power (P) = 50 W
Mass per unit length (μ) = (6 × 10⁻³ ) / 8 = S × v
Angular speed (ω) = 2 × π × f
= (2 × π × v ) / λ
= (2 × π × 30) / 0.2
Now, Average power (P) = (1/2) × ρ × ω² × A² × S × v,
Thus, Amplitude (A) =
= (1/ω) × √((2 × P)/ (ρ × μ))
= A = [ (0.2) / 2×π × 30 ] √ ((2×50×8)/ (6 × 10⁻³ × 30 ))
= A = 0.0707 m
= A = 7.07 cm
(b) Average power = P
Wave speed = V
Using the equation of Power = (1/2) × ρ × ω² × A² × S × v,
We can see that P ∝ ω² × v
= P ∝ v² × v
= P ∝ v³
Thus, when wave speed of string is doubled, the average power will be 8 times.
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A sample of a gas (5. 0 mol) at 1. 0 atm is expanded at constant temperature from 10 l to 15 l. The final pressure is __________ atm.
The final pressure of a sample of a gas (5.0 mol) at 1.0 atm is expanded at constant temperature from 10 l to 15 l is 0.67 atm
Boyle's law states that at constant temperature of a given mass of confined gas, the product of its pressure and volume is also constant. Let P1 and V1 be the initial pressure and volume of the gas and P2 and V2 be the final pressure and volume of the gas.
P1 = 1 atm
V1 = 10 l
V2 = 15 l
According to Boyle's law,
P1 V1 = P2 V2
1 * 10 = P2 * 15
P2 = 10 / 15
P2 = 0.67 atm
Therefore, the final pressure is 0.67 atm
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tv broadcast antennas are the tallest artificial structures on earth. in 1987, a 73.5 kg physicist placed himself and 400 kg of equipment at the top of one 610-m high antenna to perform gravity experiments. randomized variables m
The answer to the given question is 1.90084 mm and the antenna was compressed to 19 cm respectively.
calculations;
assuming;
m = 400 kg be the total mass compressing the antenna,
h = 610 m be the height of the antenna,
g = 9.81 m/s² be gravitational acceleration,
E = 200 GPa = 2×108 N/m² be Young's modulus of steel.
The mass m applies vertical force F = mg
The cross-section of the antenna is S = πr²
Let Δh be the compression of the tower to be calculated.
By the definition of Young's modulus
Δh/h = F/(S×E)
Therefore
Δh = (h×F)/(S×E) = (h×m×g)/(πr²×E)
Substituting actual numbers
Δh = (610×414×9.81)/(π×0.15²×2×108) = 0.190084 mm
The antenna was compressed about 19 cm.
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this bar is 0.12 meters long and moving 29.6 m/s through a magnetic field of 58 mt. what is the induced electromotive force in the bar?
The induced electromotive force in the bar is 0.206 volt.
What is induced electromotive force?It is the creation of a potential difference in a coil as a result of variations in the magnetic flux flowing through it. To put it another way, it is said that electromotive force, or EMF, is induced when the flux connecting with a conductor or coil changes.
Given parameters:
Length of the bar: l = 0.12 meter
Speed of the bar: v = 29.6 m/s.
Magnetic field: B = 58 mT = 58 × 10⁻³ T.
Hence, the induced electromotive force in the bar: ε = lvB
= 0.12 × 29.6 × 58 × 10⁻³ Volt
=0.206 volt.
Hence, the induced electromotive force in the bar be 0.206 volt.
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what is the term for periods of accelerated physical development with associated changes in height and weight?
The term is growth.
This term is used to define the physical development of height and weight in an individual.
The growth depends on an individual.
During the growth the hands and feet are likely to grow. This develops the height of any individual and the weight is also defined as the individual grows.
It is the continuously changes of the characteristics of the body, most noticeable in height and weight.
The ages 13-15 and 17-18 the two major brain growth spurts occur. In times of growth spurts the changes is visible during the first year of puberty.
Therefore, the term for periods of accelerated physical development with associated changes in height and weight is growth.
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On vacation, your 1250-kg car pulls a 550-kg trailer away from a stoplight with an acceleration of 1.60 m/s2 . What is the net force exerted by the car on the trailer? What force does the trailer exert on the car? What is the net force acting on the car? Assume that the positive x axis is directed toward the direction of motion.
The force, net force exerted was found to be 2000N
Define force ?
In mechanics, force is any action that seeks to sustain or modify the motion of a body or to deform it. The idea of force is usually defined in terms of Isaac Newton's three laws of motion, as stated in his Principia Mathematica (1687). Newton's first principle states that a body at rest or moving at a regular pace in a straight line will continue in that condition unless some force is applied to it.
The second law states that when an external force applies on a body, it causes the body to accelerate (change in velocity) in the direction of the force. The acceleration is related to the magnitude of the external force and inversely proportional to the amount of matter in the body. According to Newton's third law, when one body exerts a force on another, the second body exerts an equal force on the first.
the cars weigh was =1250kg
trailer weight was = 550 kg
acceleration=1.60
a) F=ma
=(550)(1.60)
=880 N
b) F=ma
The net force was found to be =880 N
c) F = ma
(1250) (1.6)
=2000N
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a swimmer in an inner tube would like to ride the longshore current 0.18 km along the beach to the concession stand. the current is moving at 7.7 m/min. how long will it take the swimmer to reach the concession stand?
The distance to the concession booth is 1.386 kilometers, or kilometers per hour. A swim meet's length is influenced by a number of variables.
Why do swim meets last so long?Swim meets can last all day, but not always. A swim meet's length is influenced by a number of variables. such includes the number of participants, the number of events, and the age of the swimmers. The length of the meet might increase with the number of participants and events in a day.Use the distance formula, d = st, or distance equals speed times time, to find the distance. Given that they both reflect a certain amount of distance per unit of time, such as miles per hour or kilometers per hour, rate and speed are comparable.Explanation:
d = 0.18 * 7.7 = 1.386km/hr.
The distance to the concession booth is 1.386 kilometers, or kilometers per hour.
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Compare that speed with the Sun's orbital speed around our galaxy. Based on your comparison, do you think the galaxy's gravity would be strong enough to retain the supernova debris if there were no interstellar medium to slow it down?
Supernova debris moves about 100 times faster than the Sun. The gravity of galaxy alone would not retain the supernova debris.
Supernova debris moves about 100 times faster than the Sun. The gravity of galaxy alone would not retain the supernova debris.
A planet's orbital velocity modifications, depending on how far it's far from the solar. The closer a planet is to the solar, the more potent the sun's gravitational pull on it, and the quicker the planet actions. The farther it's far from the sun, the weaker the Solar's gravitational pull, and the slower it moves in its orbit.
Hubble's law, which says certainly that a galaxy's speed is directly proportional to its distance, additionally tells us some thing important approximately the country of the universe. If the universe is static and unchanging, there should be no correlation among distance and pace.
They must come to be greater turbulent. It produces so much visible light that it is opaque and blocks our view of anything beyond it. It reflects most light from far distances of the galaxy away from our line of sight. A star starts offevolved its time on the principle sequence with 10 solar loads.
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TRUE/FALSE. a recently discovered extrasolar planet appears to be rockier and denser than earth. it is 16 times as massive as earth, but its diameter is only twice that of earth.
The acceleration of free fall on the planet is given by 39.2 m/s².
What is the acceleration of free fall?The acceleration of free fall is the acceleration at which a body falling freely experiences the gravitational pull of a single planet. It is also known as a gravitational acceleration.
Value of the acceleration of free fall on earth is 9.8 m/s².
The formula of acceleration of free fall on any planet is given by:
g₁ = GM/R²
As the extrasolar planet appears to be rockier and denser than earth. it is 16 times as massive as earth, but its diameter is only twice that of earth, the acceleration of free fall on any planet is given by:
g₁ = GM/R² = 16GMe/(2Re)² = 4 GMe/Re = 4g = 4× 9.8 m/s² = 39.2 m/s² .
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In the experiment of the Charles' Law (V and T) you preformed, which variables are kept constant? Choose all the apply.
, , ,
Group of answer choices
A, n
B, the substance
C, P
D, V
E, T
In Charle's law, volume occupied by a fixed amount of gas is directly proportional to its absolute temperature, if the pressure remains constant.Hence, correct options are A , B and C.
Gases have a tendency to expand when heated, according to the experimental gas law known as Charle's law. The Kelvin temperature and the volume will be directly proportional when the pressure on a sample of a dry gas is held constant, according to a modern interpretation of Charles's law. According to Harles' Law, a gas's volume at a constant pressure is directly proportional to its Kevin temperature for a given mass. V1/T1=V2/T2 is how the relationship between temperature and volume is expressed mathematically. The balloon will revert to its original shape once you are back in a warm environment, though. This is due to Charles' Law, which states that a gas, in this case, helium, occupies more space when it is warm.
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a parallel-plate air capacitor is to store charge of magnitude 290 pc on each plate when the potential difference between the plates is 41.0 v . A.If the area of each plate is 6.80cm2, what is the separation between the plates? B.If the separation between the two plates is double the value calculated in part (a), what potential difference is required for the capacitor to store charge of magnitude 260pC on each plate?
The separation between two plates of parallel capacitor is 8.51 mm and when the separation is doubled the capacitance is reduced to halve.
Magnitude of Charge (Q) = 290 pc
Potential difference between plates (V) = 41.0 V
Let capacitance be = C
Using the relationship between charge and potential difference,
= Q = C × V
= C = Q / V
= C = 290 × 10⁻¹² / 41
= C = 7.07 × 10⁻¹² F
Now, we know that C = (ε × A) / d
Here, Area (A) = 6.80 cm² and
Distance = d
Thus, distance =
= d = (ε × A) / C
= d = (8.85 × 10⁻¹² × 6.80 × 10⁻⁴) / (7.07 × 10⁻¹²)
= d = 8.51 × 10⁻⁴ m
= d = 8.51 mm
Using Q = C × V,
= V = Q/C
If the separation between the two plates is doubled, then the capacitance is halve of the original value.
Thus, new V =
= 41 × 2
= 82 V
Hence, the new capacitance is 82 V when the distance of plates is doubles and the original separation between plates is 8.51 mm.
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how to shape the front's armhole for a knitted vest so that the fabric does not bunch up at the armhole
For having a perfect fronts armhole one need to measure the armhole depth.
How to measure armhole depth?
To measure armhole depth one trick is to wrap a measuring tape from the shoulder to the armpit.
One can take measuring tape down over the front of the shoulder and arm, pausing once it hits the center of armpit. This measurement is referred to as your Armhole depth.
Formula for measuring the correct armhole
An armhole is a sleeve that joins body and shoulder by which the sleeve meets the body at the underarm.
There is a Formula for measuring the correct sleeve and each specific site has its own table to measure the perfect armhole
In Centimeters the formula is
Bust/6 + 3.5 to 6cm
In inches the formula is
Bust/6 + 1.37 to 2.3 in
The usual width of the armhole is 4-6cm
If a person is XS -S most likely they will have 4cm of width for their sleeve
And if the person is M, L or XL, most likely they will have width of 5-6cm
Hence this can also be taken as reference.
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at what rate, in megawatts, must energy be dissipated when the full current is switched off in 65 ms?
The energy dissipation should be 65 Kilo joule.
Power is nothing but measurement the rate of electrical energy transfer by an electric circuit per unit of time. It is denoted by P and measured using the SI unit of power which is watt or one joule per second. Electric power is commonly supplied by electric batteries and produced by electric generators.
So, P = ΔE/Δt
here P = 1 megawatt and time is 65 x 10^-3 sec
putting the values we get that
1 x 10^6 = ΔE/ 65 x 10^-3
ΔE = 10 ^ 6 x 65 x 10 ^-3
ΔE = 65 x 10 ^3
ΔE = 65 K Joule
hence the energy dissipation should be 65 Kilo joule.
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assuming the crate weighs 100 lbs, calculate the tension in each example and explain if a directional advantage exists or not.
Tensions in each examples are, T=222.264 N, T=0 T=148.176 N, T=111.132 N.
Given,
m=100lbs,=45.46 kg
(a) 2T= mg
T=mg/2
=(45.46×9.8)/2
T=222.264 N
(b) For pulley
2T= mg
T=mg/2
T=222.264 N
For pulley 2:
2T=[tex]W_p_u_l_l_e_y[/tex]=0
T=0
(c) Here 3T=mg
T=mg/3
T=148.176 N
(d) Pulley 1:
3T=mg
T=148.176 N
Pulley 2:
T-(-T)=0
2T=0
T=0
(e) Pulley:
4T=mg
T=mg/4
T=111.132 N
From the above cases we can say that the directional advantages exist as the tension get divided to those string which are connected to that weight only.
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which of the following reactions would be inhibited in the presence of large amounts of an egg white protein that binds and sequesters biotin?
The correct answer is pyruvate to oxaloacetate.
Enzymatic activation of pyruvate kinase increases cytosolic oxaloacetate to inhibit the Warburg effect is a research paper written by Elizabeth K Wiese, Sadae Hitosugi, Sharon T Loa, Annapoorna Sreedhar, Lindsey G Andres-Beck, Kiran Kurmi, Yuan-Ping Pang, Larry M Karnitz, Wilson I Gonsalves and Taro Hitosugi.
Avidin is a glycoprotein, four identical subunits are there in avidin. It is found in white part of the egg of reptiles, amphibians, and birds.
Avidin binds in specific manner with biotin.
Avidin is resistant to some of the enzymes like pancreatic enzymes.
Therefore, the conversions of Pyruvate into glucose and and the conversion of Pyruvate into oxaloacetate would be blocked if the avidin is added to a cell homogenate.
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density and refractive index are class characteristics, and a match does not meet the criteria for individualizing a glass fragment to a common source.
Density and refractive index are class characteristics and match does not meet the criteria for individualizing glass fragment to a common source is true.
How to individualize glass fragments?The only way to individualize glass fragments at a crime scene to a single source is to assemble the fragments and physically fit them together just like a jigsaw puzzle.
Glass is physical and class evidence. Glass can be considered as an individual evidence if the pieces of broken glass can be reassembled & can help in identifying location, sequence of events & object identity
Forensic glass samples can be analyzed by comparing refractive index of the sample to the possible source.
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g based on our understanding of the universe, which is true about the expansion of space?
When scientists refer to the cosmos as expanding, they indicate that it has been expanding ever since the Big Bang, when the universe first began.
Explain about the universe?Everything in the cosmos is all the matter and energy that are present in space are included. Additionally, it naturally encompasses you and time itself. The other planets and their numerous moons, in addition to Earth and the Moon, make up the cosmos.
Due to their frequent confusion, it's also critical to understand the distinction between space and the universe. All celestial bodies, matter, energy, galaxies, solar systems, and other such physical entities are collectively referred to as the universe. Space, on the other hand, describes the bare space in between all of these things.
As of right now, there is no evidence to support the existence of multiple universes; instead, what we can see points to the existence of just one, namely, our own.
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Two blocks are attached to opposite ends of a massless rope that goes over a massless, frictionless, stationary pulley. One of the blocks, with a mass of 5.0 kg accelerates downward at 34g.The mass of the other block moving upwards is 4.71 kg
The acceleration of the block moving upward is 5.15g.
The two blocks of mass 5 kg and 4.71 kg are connected by a massless rope, that goes over a frictionless, stationary pulley.
The acceleration of the 5 kg block is 34g in downwards direction.
So, if the tension is the rope is T, then we can write,
For the 5 kg block,
5g - T = 34g
For the 4.71 kg block,
T - 4.71g = 4.71a
Where, a is the upward acceleration of the block of mass 4.71 kg,
Solving the above 2 equations,
We get,
5g - 4.71(a-g) = 34g
Solving further,
9.7g - 4.71a = 34g
4.71a = -24.3g
a = -5.15g
So, the upward acceleration of the 4.71kg block is -5.15g.
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different light sources give different ranges of wavelengths associated with the colors of light. colors fade from one to the other gradually, therefore it is hard to establish exact ranges. nevertheless, it is useful to know how the approximate wavelength ranges correspond to the main colors of light. the visible light area of the electromagnetic spectrum can be found in the chempendix. match each wavelength range to its corresponding color.
The range of the wavelength 650-740 nm is of the colour red, 390-420 nm is of the colour violet, 510-550 nm is of the colour green, 450-480 nm is of the colour blue, 570-600 nm is of the colour yellow, 600-640 nm is of the colour orange.
The visible region of the electromagnetic spectrum ranges from higher frequency (violet) to lower frequency (red).
All the forms of electromagnetic radiation fall within the electromagnetic spectrum.
Electro magnetic energy travels in waves that contains a broad spectrum from radio waves to gamma rays. The human eye can detect a very small portion of this spectrum known as visible light ranging from 380-700 nano metres.
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A flea gets its thrills by riding on the outer edge of a golden oldies record album of radius 15 cm as it is being played with a rotational period of 1.8 seconds. a) what is the flea’s average speed? b) what is the flea’s centripetal acceleration?
A. The average speed of the flea is 0.52 m/s
B. the centripetal acceleration of the flea is 1.8 m/s²
A. How do I determine the average speed?
We'll begin by obtaining the angular velocity. This can be obtained a follow:
Period (T) = 1.8 sPi (π) = 3.14Angular velocity (ω) =?ω = 2π/ T
ω = (2 × 3.14) / 1.8
ω = 3.49 rad/s
Finally, we shall determine the average speed. This is shown below:
Angular velocity (ω) = 3.49 rad/sRadius (r) = 15 cm = 15 / 100 = 0.15 mAverage speed (v) = ?v = ωr
v = 3.49 × 0.15
v = 0.52 m/s
Thus, the average speed is 0.52 m/s
B. How do I determine the centripetal acceleration?
Haven obtain the average speed in the calculation made above, we can determine the centripetal acceleration as follow:
Average speed (v) = 0.52 m/sRadius (r) = 0.15 mCentripetal acceleration (a) =?a = v² / r
a = (0.52)² / 0.15
a = 1.8 m/s²
Thus, the centripetal acceleration is 1.8 m/s²
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english homework 7 grade
can I get help first, second and third person
Explanation:
First person:
First person is like you telling a story. It uses words like I or we. For example "I walked to the library after school," would be an example of first person. You are talking about yourself and what you did.
Second person:
Second person is referring to someone else. It uses words like you. This is like in a choose your own adventure book, with a sentence like "You advanced to the next level," or "You opened the door cautiously." You are talking about someone else, usually the person reading what you are righting.
Third person:
Third person is like you referring to someone in general. Common words for third person are she, he, they, them, or it. It is not always you talking about yourself or someone else. Some common examples are "The girl in the red coat then ate the cookie," or "They were in trouble!"
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A baseball is thrown vertically upward and feels no air resistance. As it is rising.
A baseball is thrown vertically upward and feels no air resistance. As it is rising its momentum is not conserved, but its mechanical energy is conserved.
What is Momentum?Momentum may be defined as a unique property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity.
According to the context of this question, as an object typically moves along the vertical direction, the gravitational potential energy, and the kinetic energy change. So, due to this, its momentum is not conserved, but its mechanical energy is conserved.
Therefore, a baseball is thrown vertically upward and feels no air resistance. As it is rising its momentum is not conserved, but its mechanical energy is conserved.
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What are the two missing words in this sentence? A ______ _______ camera detects infrared radiation and uses this information to create a picture
A thermal infrared sensor camera detects infrared radiation and uses this information to create a picture.
How does a thermal infrared sensor camera work?In thermal or infrared detection systems, sensors are used to detect radiation in the infrared region of the electromagnetic spectrum. The thermal energy or heat produced by the scene being watched is detected by an infrared camera, which then transforms it into an electrical signal. After that, this signal is processed to create an image. An infrared camera's ability to detect heat can be quantified very precisely. Infrared cameras can be used to assess thermal performance and gauge the intensity of heat-related issues. In general, bodies and objects produce more radiation when they are heated up. Walls and other solid things cannot be seen through infrared cameras. They are limited to measuring heat.
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