Which device provides electrical energy to run an electric circuit

A. The wire

B. The switch

C. The battery

D. The light bulb

It is possible to alter the weather on a small scale.

Light travels faster than anything else in the universe A. True B. False

Which of the following is NOT an example of work? a. a windmill turning in the wind b. a person sliding a box across the floor c. a metal bar bracing a leaning brick wall d. an air bag deploying in an automobile wreck

When a beam of light passes at an oblique angle into a material of lower optical density, the angle of incidence is A. less than the angle of reflection. B. less than the angle of refraction. C. greater than the angle of reflection. D.

A student slides down a slide at recess. After getting off the slide he goes to cross the monkey bars. As he touches the metal of the monkey bars, he gets a shock. How did the electric charge transfer from the slide to his body?

If two forces of equal magnitude act on an object that is hinged at a pivot, the force acting farther from the pivot must produce the greater torque about the pivot.

How is conductivity related to resistance?

8. A 300g mass hangs at the end of a string. A second-string hang from the bottom of that mass and supports a 900g mass. (a) Find the tension in each string when the masses are accelerating upward at 0.700m/s2.

Calculate the speed (in m/s) of an electron and a proton with a kinetic energy of 1.85 electron volt (eV). (The electron and proton masses are me = 9.11 ✕ 10-31 kg and mp = 1.67 ✕ 10-27 kg. Boltzmann's constant is kB = 1.38 ✕ 10-23 J/K.)

Jack and George meet in the middle of a lake while paddling in their canoes. They come to a complete stop and talk for a while. When they are ready to leave, Jack pushes George's canoe with a force F to separate the two canoes.