The speed of sound waves through ocean water is 1437 m/s. Assume that ultrasound waves take 2 seconds to travel from
a sonar device on a ship to the bottom of the water and back
to the ship again. How deep is the water?

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