How much current does a 10.0 ω resistor draw from a 12 v battery?
a. 1.2 x 10^2 a
b. 1.2 x 10^0 a
c. 1.2 x 10^3 a
d. 1.2 x 10^-3 a

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

Ain is , is 's of ? 0.62 0.79 1.27 1.50

Arailroad car collides with and sticks to an identical railroad car that is initially at rest. after the collision, the total kinetic energy of the two cars is a) the same as before. b) half as much as before. c) one third as much as before. d) one fourth as much as before. e) twice as much as before.