A set of pulleys is used to lift a piano weighing 1,000 newtons. The piano is lifted 3 meters in 120 seconds. How much power was used?

The acceleration of an object depends on what two things? Question 3 options: The amount of matter in an object and it's size. The velocity of the object and force applied. The mass of the object and the distance away for the force it is.

why is it important for digestive system functions that mucous membranes can secrete and absorb susbstances?

Most cells cannot harness heat to perform work because

Using our understanding of orbits, which orbits (near or far) are moving more slowly? near far

A man paddles a canoe in a long, straight section of a river. The canoe moves downstream with constant speed 5 m/s relative to the water. The river has a steady current of 1 m/s relative to the bank. The man's hat falls into the river.

Which of the following statements is true regarding the use of refrigerants? a. if your equipment is recovery only, refrigerant that is removed from vehicles should be poured down the drain b.

When would the velocity of a wave traveling in a medium change? A - only if a property of the wave changes B - only if a property of the medium changes C - if a property of both the wave and the medium changes D - never

If the moon did not have an atmosphere what would happen to it

a 2.0 kg mass moving to the east at a speed of 4.0 m/s collides head-on in a perfectly inelastic collision with a stationary 2.0 kg mass. how much kinetic energy is lost during

How did people years ago find out which side of a magnet was north and which was south?