Earth has approximately 600,000,000 meters of coastline. If we assume this entire length of coastline has sandy beaches
60 meters wide and 20 meters deep, how many cubic meters of sand are on the beaches?
Express your answer to the correct number of significant figures.
There are
10
cubic meters of sand on the beaches.

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?