Air is a mixture of what?
1. Elements
2. Atoms
3. Compounds
4. Molecules

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)

Which describes increasing the efficiency of energy resource