The source of the energy in uv light that can give you a sunburn is a. your skin b. deep space c. earth's atmosphere d. nuclear reactions in the sun

What are chlorofluorocarbons and what impact do they have on the atmosphere?

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

If a hiker that weighs 600 newtons climbs a 50 meter hill, how much gravitational potential energy has the hiker gained?