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A certain refrigerator is rated as being 33% as efficient as a Carnot refrigerator. To remove 107 J of heat from the interior at 0 °C and eject it to the outside at 24 °C, how much work must the refrigerator motor do?
What is the acceleration of a car that moves at a steady velocity of 100 km/h for 100 second? Explain your answer and state why this question is an exercise in careful reading as well as in physics.
A child looks at his reflection in a spherical Christmas tree ornament 8cm in diameter, and sees his image reduced by half. How long is his face from the ornament.
A circular surface with a radius of 0.062 m is exposed to a uniform external electric field of magnitude 1.55 104 N/C, What is the angle between the direction of the electric field and the normal to the surface
A service station charges a battery using a current of 6.6A for 4.0h, How much charge passes through the battery
Why does the base of a shuttle cock always lead in motion when hit with a racket. what is grocery carts final speed.
A 9.15 kg object on a horizontal frictionless surface is attached to a spring with k = 2350 N/m. find the initial potential energy of the block-spring system
A 16000kg airplane lands with a speed of 92m/son a stationary aircraft carrier deck that is 115 mlong. Find the work done by nonconservative forces in stopping the plane
A block of mass m = 0.828 kg is fastened to an unstrained horizontal spring whose spring constant is k = 91.3 N/m. Find the angular frequency of the resulting oscillatory motion
Find the initial velocity and how long the ball was in the air before it hit the ground
How high a tree would a 79.0 kg person have to climb to increase his gravitational potential energy relative to the ground by that amount.
In an experimental set-up, where a wire with a linear mass density of 1 g/m was clamped at one end, at what frequency would you need to vibrate the wire
A room with a pine ceiling measured 10 m x 6 m x 2 cm thick. On a cold day the temperature on inside of the ceiling is T1 = 24 oC, Find the rate the heat is moving through the pine ceiling
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