In an electrical circuit, which of the following controls whether or not electrons flow through the circuit?

A. a switch

B. a battery

C. a resistor

D. a light bulb

What happens to potential energy when a skier goes down the hill? A. Decrease B. Increase

What is the currency for performing work and what is its unit?

Which statement about an electromagnet is true? A. It doesn't function without a source of current. B. The core is made from a nonmagnetic material. C. It uses moving magnets to create an electric field. D.

Without the force of friction, people would not be able to walk.

A value that describes how heavy an object is and is related to the force of gravity is: a. mass c. a Newton b. weight d. none of the above

What is the current in a 160V circuit if the resistance is 2Ω?

A thermometer is placed in water in order to measure the water's temperature. What would cause the liquid in the thermometer to drop? A. The molecules in the water spread apart. B. The molecules in the thermometer's liquid spread apart. C.

The amount of energy carried by a wave is proportional to the square of the wave's A. frequency B. amplitude C. wavelength D. period ... ?

The pressure at the bottom of a jug filled with water does not depend on

at what other angle will a thrown ball go the same distance as one thrown at an angle of 75 degrees?