El. a white ball with mass 143 g is moving at a velocity of 7.9 m/s.
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it collides with a red ball with mass of 150 g.
the red ball is stationary before the collision. the white ball stops after the collision.
calculate the velocity of the red ball after the collision.
give your answer to two significant figures.

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

Which of these metals are magnetic?

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?