If it makes 50 complete back-and-forth wiggles in 1 second, then its frequency is <em>50 Hz</em>.
In 1980 the average yearly ice loss found was -.05 whereas in the year of 2010 the average yearly ice loss found was -14. it is two hundred and eighty times greater than the average yearly ice loss in the year 1980.
The gravitational force between them is <em>1.25 x 10^20 Newtons.</em>
(I think you must have typed the mass of the moon wrong.
It must be 6.0 x 10^22 kg.)
