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The motor in a refrigerator has a power of 156 W. If the freezing compartment is at 268 K and the outside air is at 302 K, and assuming the efficiency of a Carnot refrigerator, what is the maximum amount of energy that can be extracted as heat from the freezing compartment in 21.0 min?
Points A and B have electric potentials of 257 V and 129 V, respectively. When an electron released from rest at point A arrives at point C its kinetic energy is KE1, What is the electric potential at point C
Assume that a 16.5 m/s wind is blowing across the roof of your house. The density of air is 1.29 kg/m3. Conclude the reduction in pressure (below atmospheric pressure of stationary air) that accompanies this wind.
A car travelling at 19 {rm m/s} runs out of gas while travelling up a 21^circ slope. How far would the car go up the hill before it runs out of gas.
A 12 kg box slides 4.0 {rm m} down the frictionless ramp, and then collides with a spring whose spring constant is 240 N/m.
A ball rolls off a table with a horizontal velocity of 5 m/s If it takes 0.6 secs for it to reach the floor A. What is the verticle componet of the balls velocity just before it hits the floor? (use g= 10 m/s^2) B. What is the horizontal componet ..
The electron's magnetic moment is known as the "Bohr Magnetron" and has a theoretical value of ?B?eh4?m, where "h" is Planck's constant (h=6.63×10?34 J?s), Calculate the magnetic moment value of the Bohr Magnetron
Dust particles are pulverized rock, which has density 2500 kg/m3. They are approximately spheres 20 ?m in diameter. what is the root-mean-square speed (thermal speed) of a dust particle at 60°C
compute the coefficient of kinetic friction between block A and the tabletop.
The position of a particle moving along an x axis is given by x = 14.0t2 - 3.00t3, where x is in meters and t is in seconds. find the maximum positive velocity reached by the particle
a bathyshpere dives to a depth of 1000 m in the ocean. if the inside is maintained at one atmosphere, what is the net force acting on the round window
A 2.0 cm tall candle flame is 1.8 cm from a wall. You happen to have a lens with a focal length of 36 cm . 1. How many places can you put the lens
A high-speed photograph of a club hitting a golf ball, find the average force exerted on the ball by the club
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