How much work is performed when a 42kg crate is lifted to a height of 2m?

Which of the following is a true statement? A. In a generator, electrical energy is converted into the energy of motion. B. In a motor, the energy of motion is converted into electrical energy. C.

Consider the third period of the periodic table. Which element has the smallest atomic radius? A) argon B) scandium C) silicon D) sodium

Alternating current is normally produced by a A) battery. B) generator. C) both of these. D) neither of these.

How far a wave travels in one second is a measure of wave

In a common but dangerous prank, a chair is pulled away as a person is moving downward to sit on it, causing the victim to land hard on the floor. Suppose the victim falls by 0.50 m, the mass that moves downward is 79.

Comparing and contrasting ionic and covalent bonds?

Elevation above sea level is called

The train traveled 500 kilometers north to Odessa in 2 hours. What's the train's speed? What is the velocity?

Are microwaves and radio waves faster or slower than other types of electromagnetic energy?

If you dive under-water, you notice an uncomfortable pressure on your eardrums due to the increased pressure. The human eardrum has an area of about 70 mm2 (7*10-5m2), and it can sustain a force of about 7 N without rupturing.