Imagine a Carnot engine has a hot reservoir of 680 K and a cold reservoir of 220 K. What is the efficiency of the engine?

Bob is pushing a box across the floor at a constant speed of 1.4 m/s, applying a horizontal force whose magnitude is 65 N. Alice is pushing an identical box across the floor at a constant speed of 2.8 m/s, applying a horizontal force.

When entering a bicycle lane to make a right turn, within how many feet must you enter the lane before making the turn?

If someone weighs 1,059 N, what is their mass

A boxer hits a punching bag with a force. Describe what happens. A. Since the punching bag moves, the amount of force applied to the punching bag is greater than the amount of force punching bag applies on the boxer's hand. B.

A light, flexible, non-stretching cable is wrapped several time around a winch drum, a solid cylinder of mass 50 kg and diameter 0.120 m, which rotates about a stationary horizontal axis held by frictionless bearing.

A student is measuring the effects of an electric circuit on a compass, and he is testing to see increasing the current will cause the compass needle to change direction faster. He does one trial using a 9-volt battery and another trial using a 1.

A bowling ball and a bag of potato chips are dropped at the same time from a tall tower on the moon. there is no air on the moon. what happens?

Imagine a Carnot engine has a hot reservoir of 680 K and a cold reservoir of 220 K. What is the efficiency of the engine?

The loudness of a sound is its frequency. true or false?

Will loud sounds from traffic near a school break glass objects inside the school