A0.40kg object is attached to a spring constant 160n/m so that the object is allowed to move on a horizontal frictionless surface. the object is released from rest when the sprin g is compressed 0.15m find:
a) the force on the object and b) its acceleration at this instant.

What causes the formation of ocean currents?

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration

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?