2. A student infiates a balloon attached to a plastic straw. A string is threaded through the straw and
tied to opposite ends of the room. When the air in the balloon is released, the balloon travels the
length of the string.
Which of Newton's laws best explains this phenomena?
F.
G.
The law of magnetism.
The law of force and acceleration.
The law of action-reaction.
The law of gravity
H.
J.

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?