A girl lifts a ball of 2 kg from the ground up vertically a height of 0.5 meters. How much work does she do?

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space. b. we'll know it immediately because it will be brighter than the full moon in the sky. c. we won't know about it until 600 years from now. d. none of the above.