How do electric motors create movement?

A. by harnessing gravitational potential energy

B. by using electrically-produced magnetic fields

C. by electric current through turbine blades

D. by spinning magnets to induce electric current

Will a homemade telephone made of two cans and a string work better with a tightly woven string or a loosely woven string?

A backpack gets carried from p to s. along which dashed path, if either, would it gain more gravitational potential energy: the direct path or the curvy path? explain.

Why can't conductors generate static electricity when rubbed together? a. They do not contain electrons c. They will direct excess charge to earth b. They do not have ions d. Conductors only store charge

Select the statement that correctly describes how light travels. Light cannot travel in a vacuum because it travels slower when the light source is moving. Light cannot travel in a vacuum because the light source is stationary.

Microchips have between 50 and 100 transistors on them True False

What is s the best description of the constructive interference of light? A. two waves have the same direction of displacement. B. two waves have displacement in opposite directions. C. a longitudinal wave meets a transverse light wave D.

1875 kg car is traveling at 22 m/s. It's momentum is?

Hot air balloon rises because a) molecules become lighter when heated b) molecules move faster and farther apart when heated c) molecules are less attracted by gravity when heated d) molecules become charged and repel each other when heated

If the diameter of the space station is 730 m, how many revolutions per minute are needed for the "artificial gravity" acceleration to be 9.80m/s2?

A person who has dissociative identity disorder: O A. cannot remember who he or she is. O B. has panic attacks when confronted. C. has two or more distinct personalities OD hears voices