I have a quiz and its hard so i cant copy and paste it onto this cause its 3 chapters long Dont delete

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

Glass has a hardness that is in the middle of the hardness scale. what is the hardness of glass?

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