A0.060-kg tennis ball, initially moving at a speed of 12 m/s, is struck by a racket causing it to rebound in the opposite direction at a speed of 18 m/s.

what is the change in momentum of the ball?
a) 0.72 kg·m/s

b) 0.36 kg·m/s

c) 1.1 kg·m/s

d) 1.8 kg·m/s

Aball has an initial velocity of 3 m/s. if there is no friction, what is the highest it could roll?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

The dipole moment of the water molecule (h2o) is 6.17x10^-30 c.m. consider a water molecule located at the origin whose dipole moment p points in the +x-direction. a chlorine ion ( of charge-1.60x10^-19c , is located at x=3.00x10^-9m . assume that is much larger than the separation d between the charges in the dipole, so that the approximate expression for the electric field along the dipole axis can be used. a) find the magnitude of the electric force that the water molecule exerts on the chlorine ion. b) what is the direction of the electric force. -x-direction or +x-direction c) is this force attractive or repulsive?