Lucia throws a ball into the air. She applied 17 N of force to throw it, and the gravitational force is 7 N. What is the net force?

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