an 80kg mountaineer climbs a 3000m mountain in 10h. What is the average power output during the climb

Why is the work output always less than the work input?

When water particles in their gaseous state (X) lose enough energy they

When you push a toy car it eventually stops this is due to something called

what is the gravitational potential energy of a clock that had a mass of 4 kg and is positioned 1.5 m off the ground

Pete slides a crate up a ramp with constant speed at an angle of 23.2 ◦ by exerting a 137 N force parallel to the ramp. How much work has been done against gravity when the crate is raised a vertical distance of 2.

Solve the following automotive-services problem. Remember I = E/R, where (I = amps) against resistance (R = ohms) in the electric field (E = volts.). Resistance = 0.2 ohm Current = 30 amps Voltage = 6 (T/F)

1: Explain how you can use Boyle's Law to determine the new volume of gas when its pressure is increased from 270 kPa to 540 kPa? The original volume of gas was 1 L. Assume the temperature and number of particles are constant.

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If a skater who is spinning pulls her arms in so as to reduce her rotational inertia by half, by how much will her angular momentum change? by how much will her rate of spin change?

What an object is made up of and the color of light that strikes it determine the A) apparent color of object B) transparency of the object C) opacity of the object D) translucence of the object