Anyone please help??? (law of gravitation)

The four giant gas points that are made primarily of lightweight elements are

In science and physics what is the standard unit of measure for speed?

On your wedding day your lover gives you a gold ring of mass 3.67 g. 48 years later its mass is 3.44 g. on the average how many atoms were abrated from the ring during each second of your marriage? the atomic mass of gold is 197 u. don't enter units