What is the weight of a 4kg box

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

Bonds within one water molecule are examples of

Aspring that is stretched 2.6 cm stores a potential energy of 0.053 j. what is the spring constant of this spring?