action force by Diver, the reaction force is by Diving board, direction of action force is down, direction of reaction force is up.
What is Action and Reaction force?Forces, often known as action and reaction forces, always act in pairs. The force exerted by the initial action on an item is known as the action force, and the force exerted in the opposite direction by the object is known as the reaction force.
Which object exerts the action force?
diver
Which object exerts the reaction force?
diving board
In what direction does the action force push?
down
In what direction does the reaction force push?
up
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Answer:
Which object exerts the action force?
diver
Which object exerts the reaction force?
diving board
In what direction does the action force push?
down
In what direction does the reaction force push?
up
Explanation:
What is the speed of a transverse wave in a rope of length 3. 1 m and mass 86 g under a tension of 380 n?
117 m/sec is the speed of a transverse wave in a rope of length 3. 1 m and mass 86 g under a tension of 380 n.
The wave speed v is given by
v= √τ/μ
where τ is the tension in the rope and μ is the linear mass density of the rope.
The linear mass density is the mass per unit length of rope :
μ= m / L = (0.086 kg)/(3.1 m)=0.0277 kg/m.
v= [tex]\sqrt{ \frac{380 N}{0.0277 kg/m}}[/tex] = 117.125 m/sec (approx. 117 m/sec
In physics, a transverse wave is a wave whose oscillations are perpendicular to the direction of the wave's advance. This is in contrast to a longitudinal wave which travels in the direction of its oscillations. Water waves are an example of transverse wave.
Transverse waves commonly occur in elastic solids due to the shear stress generated; the oscillations in this case are the displacement of the solid particles away from their relaxed position, in directions perpendicular to the propagation of the wave. These displacements correspond to a local shear deformation of the material. Hence a transverse wave of this nature is called a shear wave. Since fluids cannot resist shear forces while at rest, propagation of transverse waves inside the bulk of fluids is not possible.
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Give a qualitative description of the skydiver's motion after jumping out of the plane.
Explanation:
They will have not much control over their speed or rotational energy. they will carry a lot of gravitation potential energy which will get converted to kinetic energy as they fall through the atmosphere. They will reach their terminal velocity, the fastest they can travel with earth's gravity before they pull their parachute, when they use a parachute to extend their surface area, increasing wind resistance. this allows them to land safely.
Suppose a bicyclist rides at a constant velocity of 4.4 m/s up a 10° slope. the total mass of bicycle and rider is 85 kg. neglecting air friction, what is his power output?
Power output will be = 637.7448 W
Newton's third law states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. The third law is also known as the law of action and reaction.
Power Output means the average rate of electric energy delivery during one Metering
The upward force by which the bicycle is riding up will be equal and opposite to m*g*sin(10°) (using newtons third law)
Force (upward ) = m*g*sin(10°)
given
v = 4.4 m/s
mass (m) = 85 kg
F (upward ) = m*g*sin(10°)
ma = m*g*sin(10°)
a = g*sin(10°)
= 9.8 * sin(10°) = 1.7052 m / [tex]s^{2}[/tex]
Power = work / time = Force . displacement / time = mass * acceleration * velocity
= m * a * v
= 85 * 1.7052 * 4.4
= 637.7448 W
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The height of the 500-mb pressure level plotted at North Platte (LBF) in western Nebraska was ______ m above sea level (denoted 555).
The height of the 500-mb pressure level plotted at North Platte (LBF) in western Nebraska was 5,570 meters m above sea level.
What is pressure?
Pressure is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Pressure level plotted at North PlatteRecalling that the heights plotted at individual stations on 500-mb maps are in tens of meters (place a 0 to the right of the three plotted digits).
The coded height at North Platte, in west-central Nebraska, ("557") indicated 500 mb occurred at 5,570 meters above sea level.
Thus, The height of the 500-mb pressure level plotted at North Platte (LBF) in western Nebraska was 5,570 meters m above sea level.
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An olympic high diver has gravitational potential energy because of her height. as she dives, what becomes of her energy just before she hits the water? air resistance is negligible
An Olympic high diver has gravitational potential energy because of her height. As she dives, kinetic energy becomes of her energy just before she hits the water.
Gravitational potential energy is the energy possessed or acquired by an object due to a change in its position when it is present in a gravitational field. In simple terms, it can be said that gravitational potential energy is an energy that is related to gravitational force or to gravity.
Kinetic energy is the energy of motion, observable as the movement of an object, particle, or set of particles.
When the high diver is standing stable and not moving , that diver has a gravitational potential energy because of the height . The moment she dives , before hitting the water , from being stationary she gained some momentum and come in motion , due to motion her gravitational potential energy will change to kinetic energy before hitting the ground.
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Tyre pressure for car
Answer:
oxygen expanding unjhfyysue hjdbdhdjjhd
Answer:
32 psi to 35 psi.
Explanation:
Normal tire pressure is usually between 32~40 psi(pounds per square inch) when they are cold. So make sure you check your tire pressure after a long stay and usually, you can do it in the early morning.
A projectile is fired into the air at a 35o angle to the horizontal and an initial velocity of 120 m/s. what are the x and y components of the velocity vector?
Answer:
See below
Explanation:
X component = 120 * cos 35° = 98.298 m/s
Y component = 120 * sin 35° = 68.829 m/s
Any object launched into space with only gravity acting on it is referred to as a projectile. Gravity is the main force affecting a projectile. The x and y components of the velocity vector are 98.298 m/s and 68.829 m/s.
When a particle is thrown obliquely close to the Earth's surface, it travels along a curving route while experiencing constant acceleration. Always pointing in the direction of the Earth's center is this curving path. Such a particle's motion is referred to as projectile motion, and its trajectory is known as the projectile's trajectory.
The components of the projectile are:
X component = 120 × cos 35° = 98.298 m/s
Y component = 120 × sin 35° = 68.829 m/s
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Which pairs of subsets of the real number system have no common elements?
Answer:
Odd and even
Explanation:
Odd and even numbers have no common elements
heat = 80J light = 119J sound = 1J electricity = 200J what form of energy is transferred as waste energy by the television set?
The form of energy that is transferred as waste energy by the television set is heat energy (80 J).
Waste energy by the television setBased on the law of conservation of energy, energy can neither be created nor destroyed but can be converted from one form to another.
Useful energy supplied to television setThe useful energy supplied to television set is calculated as follows;
= 119 J + 1 J = 120 J
Waste energyThe wasteful energy of the television set is calculated as follows;
= 200 J - 120 J = 80 J
Thus, the form of energy that is transferred as waste energy by the television set is heat energy (80 J).
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A scientist is searching the moons of the solar system for signs of life. He knows that an atmosphere is one of the key features of a location that can
develop life as we know it. Where should he focus his search?
A. Titan
B. Ganymede
C. Luna (Earth's moon)
D. lo
give 5 real life examples of a tension
1.car towing
2.pulling bucket of water
3.gym equipment
4.crane machine
5.tug of war
explain how potential and kinetic energy are at play when we talk about Newton's second law of motion
Potential and kinetic energy are at play when we talk about Newton's second law of motion through the various positions in relation to the bodies involved.
What is Newton's second law of motion?This law states that force is equal to the rate of change of momentum and is denoted as F = mv where m is mass and v is velocity.
Potential energy is the energy is possessed by a body by virtue of its position while kinetic energy is possessed by a body by virtue of its motion. Both forms of energy are influenced by forces and are equal to the total momentum.
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If the electric potential at a point in space is zero, then the electric field at that point must be:_________
If the electric potential at a point in space is zero, then the electric field at that point must be zero.
To find the answer, we have to know about the electric field.
How the electric field will be zero, if the potential is zero?We have the relation connecting electric field E and the electric potential V as,[tex]E=\frac{V}{L}[/tex]
If we put V=0, then the electric field will be zero.Thus, we can conclude that, If the electric potential at a point in space is zero, then the electric field at that point must be zero.
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10 kg petrol has density of 800 kg/m³. Find its volume in cm³.
The answer is 12,500 cm³.
First, let's find the volume in m³.
Volume = Mass ÷ Density
Volume = 10 kg ÷ 800 kg/m³Volume = 1.25 × 10⁻² m³Now, to convert from m³ to cm³ :
m³ × 10⁶ = cm³
1.25 × 10⁻² × 10⁶1.25 × 10⁴12,500 cm³A _____ is a device consisting of two conductors that can be charged with equal and opposite charges, separated by a thin insulator.
A Capacitor is a device consisting of two conductors that can be charged with equal and opposite charges, separated by a thin insulator.
How can we understand that this device is capacitor?According to principle of a capacitor, capacitor is a system of conductors or dielectric.
If there is a single conductor, it cannot holds very much current then its potential reaches to its maximum values and it cannot hold more charge.
If we place another conductor near it, its potential becomes low and it is able to store more charge.
We know from the definition of the capacitor, A capacitor is a two-terminal electrical device that possesses the ability to store energy in the form of an electric charge. It consists of two electrical conductors that are separated by a distance.
Capacitors store energy by holding apart pairs of opposite charges. The simplest design for a capacitor is a parallel plate capacitor.
Therefore, this device is called a capacitor.
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The electron in a ground-state h atom absorbs a photon of wavelength 97. 25 nm. to what energy level does the electron move?
The electron in a ground-state H atom absorbs a photon of wavelength 97. 25 nm. Energy level till where the electron move is 4
Rydberg's equation is formula which signifies relation of wavelength of incident photon and the energy level.
Rydberg's equation is used to find out the relation between the wavelength and the Energy Levels:
1/λ = RZ² (1/n₁² - 1/n₂²)
where, λ is wavelength = 97.25 nm
R is the Rydberg constant = 1.0967 × 10⁷ m
n₁ is the initial energy level i.e. the Ground state, n₁ = 1
n₂ is the higher energy level
On substitution of the above value:
1/97.25 × 10⁻⁹ = 1.0967 × 10⁷ ( 1 - 1/n₂²)
On solving,
⇒ n₂ = 4
Hence, the higher energy level is 4
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What is the length of the color attribute?
What is the longest material key can we have in our data warehouse?
The length of the colour attribute is 6 characters.
What is a colour attribute?Each colour has a distinct look based on three essential characteristics: hue, chroma (saturation), and value (lightness). It's critical to use all three of these properties when describing colour to appropriately identify it and distinguish it from others.
What is the use of colour attributes?The HTML <font> color Attribute specifies the text color within the font element. Values of Attributes: colour name: It uses the colour name to set the text colour.
It should be noticed that colours are represented by the hex triplet.
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a man uses a 900 watt electric iron to press his clothes for an average of 4 hours a week for five weeks if the cost of an electric energy is 3 Kobo per unit calculate the cost of electric energy for pressing
Answer:
[tex] \boxed{\sf54 \: kobo}[/tex]
Explanation:
Energy = Power × Time
Energy = 900× 4 ×5 = 18000 wh
Energy = 18000 wh = 18 kwh
Cost of 1 unit electricity = 3 kobo
cost of 18 unit electricity= 18 × 3 = 54 kobo
Answer:
54 Kobo
Explanation:
Units of electricity are measured in kilowatt hours (kWh).
Given information:
900 watt electric ironAppliance usage = 4 hours a week for 5 weeksUnit cost of electricity = 3 Kobo per kWhStep 1Convert the wattage of the electric iron from watts to kilowatts.
1000 watts (W) = 1 kilowatt (kW)
⇒ 900 watts = 1 ÷ 1000 = 0.9 kilowatts
This means that the power consumption of the electric iron is 0.9 kW per hour of use.
Step 2Total hours spent pressing clothes:
= 4 hours per week for 5 weeks
= 4 × 5
= 20 hours
Total power consumption:
= number of kW × number of hours
= 0.9 × 20
= 18 kWh
Step 3To find the total cost, multiply the total kWh by the cost per kWh:
⇒ Cost = 18 × 3 = 54 Kobo
An object having a fixed emissivity of 0. 725 radiates heat at a rate of 10 w when it is at an absolute temperature t. If its temperature is doubled to 2t, at what rate will it now radiate?.
The answer is heat radiates at a rate of 160w.
What is emissivity?
A substance's emissivity is a measure of how well it reflects heat radiation from its surface. Infrared radiation, which cannot be seen by human eyes, as well as visible radiation (light) are both examples of thermal radiation, which is electromagnetic radiation. The Stefan-Boltzmann law defines emissivity as the quantitative ratio of a surface's thermal radiation to that of an ideal black surface at the same temperature. The ratio is in the range between 0 and 1.
what is energy radiation?
The ability of a substance to reflect heat radiation from its surface is measured by its emissivity. The material's surface emissivity and the temperature difference between the chip surface and the surrounding air are two factors that affect power dissipation in the form of radiation.
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A charge of 2 c is at the origin. when charge q is placed at 2 m along the positive x axis, the electric field at 2 m along the negative x axis becomes zero. what is the value of q?
The value of Q will be -8 C.
In the presence of an electric or magnetic field, matter experiences a force due to its electric charge.
A moving electric charge generates a magnetic field, and an electric charge has an accompanying electric field.
The information provided in the issue is;
The separation between and is 2m.
The separation between and is 2m.
An origin charge equals +2 C
The electric fields are identical in magnitude but are facing in different directions. As a result, the following relationship can be used
Q/16=1/2
The value of Q will be -8 C.
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Th value of q is= -8C
How can we calculate the value of the q?Here, To calculate the value of q we use the formula,
The E-field due to a point charge = [tex]\frac{k\times Q}{D^{2} }[/tex]
Here we are given,
D= the distance along the axes.
k= The coulomb's constant.
We have to find, the charge along the axes = Q
Now, we have to substitute the known values in that equation for the cases,
For the E-field at x=-2 to equal 0, the E-fields from both charges must be equal in magnitude and opposite in direction.
For the first case, E from +2C charge = [tex]\frac{k\times Q}{D^{2} }[/tex] = [tex]\frac{k\times (+2C)}{2^{2} }[/tex]=[tex]\frac{k\times (+2C)}{4 }[/tex].
For the second case, E from Q charge= [tex]\frac{-k\times Q}{D^{2} }[/tex]=[tex]\frac{-k\times Q}{(2+2)^{2} }[/tex]=[tex]\frac{-k\times Q}{16 }[/tex].
Now, Comparing the two cases we can find that,
[tex]\frac{k\times (+2C)}{4 }=\frac{-k\times (Q)}{16}[/tex]
Or,[tex]\frac{+2C}{4}= \frac{-Q}{16}[/tex] (Eliminate k from both sides of the equation.)
Or,[tex]Q=-8C[/tex]
So, from the above calculation we can conclude that,
The value of q is -8C.
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An electric dipole consists of a particle with a charge of 6 x 10–6 c at the origin and a particle with a charge of –6 x 10–6 c on the x axis at x = 3 x 10–3 m. its dipole moment is:______.
An electric dipole consists of a particle with a charge of 6 x 10⁻⁶ c at the origin and a particle with a charge of –6 x 10⁻⁶ c on the x axis at x = 3 x 10⁻³ m. Its dipole moment is 18 x 10⁻⁹ Cm
Dipole moment of a dipole is dependent on the charge of the dipole and the distance between the two charges.
Electric Dipole consists of two charges which are equal and opposite in charge i.e. positive and negative charges.
Given,
Dipole moment, p = ?
Charge, q = 6 x 10⁻⁶C
Distance between charges, d = 3 x 10⁻³ m
Dipole moment (p) is given by:
p = charge x distance between the two charges
p = 6 x 10⁻⁶ x 3 x 10⁻³ Cm
p = 18 x 10⁻⁹ Cm
The dipole moment for the given charge configuration is 18 x 10⁻⁹ Cm
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A particle with a mass of 6. 67×10−27 kg has a de broglie wavelength of 7. 31 pm. part a what is the particle's speed?
The speed of the particle is 1.35 * [tex]10^{4}[/tex] m /s
The de Broglie equations relate the wavelength λ to the momentum p, and frequency f to the total energy E of a particle: where h is Planck's constant.
The wavelength (λ) that is associated with an object in relation to its momentum and mass is known as de Broglie wavelength.
λ = h / p
m= mass = 6.67∗[tex]10^{-27}[/tex] Kg
λ = 7.31 pm = 7.31 * [tex]10^{-12}[/tex] m (1 pm = [tex]10^{-12}[/tex] m)
h= Planck's constant = 6.62∗[tex]10^{-34}[/tex][tex]m^{2}[/tex]/Kg.s
v= velocity of particle = ?
λ = h / mv
v = h / mλ
= [6.62∗[tex]10^{-34}[/tex]] / [6.67∗[tex]10^{-27}[/tex]] [7.31 * [tex]10^{-12}[/tex]]
= 0.135 * [tex]10^{5}[/tex] m /s.
= 1.35 * [tex]10^{4}[/tex] m /s
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19. (a) what is the average useful power output of a robot that does 5.5 j of useful work in 12.0 hours? (b) working at this rate, how long will it take the robot to lift 3500 kg of bricks 1.8 m to a loading platform?
The average useful power output of robot is 0.0001 W
The time taken by robot to lift bricks is 630000000 sec
Given:
work done by robot = 5.5 j
time taken to do the work = 12.0 hours
weight of bricks = 3500 kg
length of bricks = 1.8 m
To Find:
The average useful power output of robot is
The time taken by robot to lift bricks is
Solution: Useful power output means the electric or mechanical energy made available for use, exclusive of any such energy used in the power production process.
P = W/t
P = 5.5/12*3600
P = 0.0001 W
So, average useful power output of robot is 0.0001 W
t = W/P
W = mgh So t = mgh/P
t = 3500x10x1.8/0.0001
t = 630000000 sec
So, time taken by robot to lift bricks is 630000000 sec
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A race car traveling northward on a straight, level track at a constant speed travels 0.760 km in 21.0 s. The return trip over the
same track is made in 26.0 s.
(a) What is the average velocity of the car in m/s for the first leg of the run?
m/s
(b) What is the average velocity (in m/s) for the total trip?
m/s
The average velocity of the car in m/s for the first leg is 36.2 m/s and the average velocity (in m/s) for the total trip is 7 m/s
What is Speed and Velocity ?Speed is the distance travelled per time taken. The S.I unit is m/s. The average speed is the ratio of the total distance travelled to the to time taken. While velocity is the distance travelled in a specific direction per time taken
Given that a race car traveling northward on a straight, level track at a constant speed travels 0.760 km in 21.0 s. The return trip over the same track is made in 26.0 s.
(a) The average velocity of the car in m/s for the first leg of the run will be
Velocity = (0.760 x 1000)/ 21
Velocity = 760 / 21
Velocity = 36.2 m/s
(b) The average velocity (in m/s) for the total trip will be
36.2 - (0.760 x 1000)/ 26
36.2 - (760) / 26
36.2 - 29.2
7 m/s
Therefore, the average velocity of the car in m/s for the first leg is 36.2 m/s and the average velocity (in m/s) for the total trip is 7 m/s
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I NEED HELP ASAP
A green filter...
Select one:
a. transmits all other colors except green light.
b. reflects only green light.
c. absorbs only green light.
d. transmits only green light.
Answer:
ig d. transmits only green light.....
This layer of the Earth is made of solid rock, it is hot and made of peridotite.
1. Continental crust
2. Kimberlite pipe
3. Oceanic crust
4. Mantle
the answer is the mantle.
If mass (M), Velocity (V) and length (L) are considered as fundamental quantities in certain system of unit. Find the dimensional formula for force.
Answer:
Explanation:
MLT^-2
.....
(a) Draw a Velocity - Time graph for an Object with Constant Acceleration.
(b) Draw a Velocity - Time graph for an Object with Constant velocity.
(c) In the given graph, compare the acceleration the body undergoes in region A and C.
Explanation:
answers to 1 and 2 above/below respectively but can't do 3 because I don't know what graph you're talking about
Which of the following are possible units for a spring constant? O A. J/m B. N/km O.C. cm/N O D. J/N
The answer is B.
We use the spring constant in Hooke's Law, which is : F = -kx
It can be rearranged so it is equal to the constant :
k = F ÷ x
Common units of Force (F) : N, kg m/s²
Common units of displacement (x) : cm, m, km
The dimensionally correct unit from the given options is :
⇒ N/km
I WILL MARK U BRAINLIEST IF U ANSWER THIS QUESTION! NEED IT ASAP PLS
A concave mirror is also referred to as a converging mirror and it can be defined as a type of mirror that is designed and developed with a reflective surface that is typically curved inward and away from the source of light.
Basically, one common use of a convex mirror include the following:
Shaving mirrorsSearchlightsDental mirrors.What is a convex mirror?A convex mirror is also referred to as a diverging mirror and it can be defined as a type of mirror that is designed and developed with a reflective surface that typically bulges outward toward the source of light.
Basically, one common use of convex mirror is as rear-view mirrors in automobiles vehicles.
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