2. A crane does 3.00 X 10^ J of work on a crate in order to lift it 20.0 meters to the roof of a construction site.
2. What is the potential energy of the crate with respect to the ground?
PE=
b. What is the mass of the crate?
M=

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.

Which statement best explains why the overall charge on an atom is zero?

What is the specific heat of wood ?