A man is moving boxes out of a house. He uses 15 N of force to lift the box 3 m from the ground into the truck. How much work did he do?

Why doesn't heat added to water make the tempature rise above 100c

In the millikan oil drop experiment they determined that every drop had a charge which was a while number multiple of -1.60x10^-19. if a drop has a total charge of -9.60x10^-19 then how many excess electrons are contained within the drop?

What is the independent variable in this investigation? mass volume sample number substance density