What are 4 physical properties for the bear

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

What is the speed vfinal of the electron when it is 10.0 cm from charge 1?

Abody covers a semicircle of radius 7cm in 5s .find its linear speed