A4-kg ball has a momentum of 12 kg. m/ s. what is the ball's speed?

a. 3 m/s
b. 4 m/s
c. 12 m/s
d. 48 m/s
e. none of these

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit