Consider an object rolling off of your lab bench. Discuss how you might be able to make measure- ments to determine its initial velocity when leaving the bench. (a) What evidence have you previously collected that makes you think your method for answering this question is feasible?

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

If the work required to stretch a spring 3 ft beyond its natural length is 15 ft-lb, how much work is needed to stretch it 27 in. beyond its natural length?

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?