17. Last January I weighed 245 pounds now I weight 197. How much less work do I have to do when running a 5 km race now?
a. 8 x10 J
b. 1.2 x10 J
c. 4.3 x10 J
d. 5.5 x10 J
e. 8 x106 J

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?