generators need a source of energy to produce electricity which form ir energy is a nonreneeable source of energy?

What is a constructive force caused by the convection in the mantle

A rock rolls down a steep hill. it's initial velocity is 1 meter per second. by the time it reaches the bottom of the hill 30 seconds later, it's velocity is 7 meters per second. what is the acceleration of the rock?

The force required to start an object sliding across a uniform horizontal surface is larger than the force required to keep the object sliding at a constant velocity.

A 12 cm radius air duct is used to replenish the air of a room 9.2 m x 5.5 m x 4.5 m every 10 min. how fast does the air flow in the duct?

Based on the wall of conservation of energy how can we reasonably improve a machines ability to do work?

A falling back in mid air has what

What objects are often arranged by their properties

Which nuclei is not radioactive? A. Am-241 B. Mg-24 C. Pu-241 D. U-238

What is the method of charging used when you run a straw with fur

A man runs at a velocity of 6.2 m/s for 11.5 minutes. When going up and increasingly steep hill, he slows down at a constant rate of 0.25 m/s^2 and comes to a stop. How far did he run?