If a battery-operated car has a resistance of 3 ohms and the current moving through it is 2 amps, what is the voltage of the battery?
a) 6v
b) 1.5 v
c) 1 v
d) 0.67 v

A10.0 kg cart and a 15kg cart are locked together with a compressed spring between them. they are then released so that the spring pushes the two carts apart. the 10.0 kg cart is moving at 4.5 m/s afterward. how fast is the 15kg cart moving? 3.0 m/s 2.0 m/s 4.5 m/s 5.0 m/s

How much force was applied to an object if was moved 2 meters and the work done on the object was 8 joules? a. 0.25 n b. 4 n c. 6 n d. 16 n

The voltage applied across a given parallel-plate capacitor is doubled. how is the energy stored in the capacitor affected?