The image shows copper wire coiled around an iron nail and connected to a battery to create an electromagnet. which factors determine the strength of this electromagnet? a. the voltage of the battery and the size of the switch b. the size of the nail and the size of the switch. c. the amount of electric current and the number of wire coils around the nail d. the number of coils of wire around the nail and the length of the wire in the circuit

Using software, a simulation of a javelin being thrown both on earth and on the moon is created. in both cases, the velocity and angle of projection are kept the same. on earth, the javelin covers a distance y. what distance would it cover on the moon? (the moon’s gravity is about 1/6th that of earth.) a. 6y b. 6/y c. y/6 d. (y+6)2

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?