Put the following objects in order of increasing gravitational potential energies. I. a 2 kg book at a height of 12 meters
II. a 6 kg rock at a height of 4 m
III. a 3 kg sack of sugar at a height of 8 m

Alandscaper is shopping for landscaping materials. she wants to use materials through which water flows easily. which materials should she choose? check all that apply. clay gravel granite rocks with cracks loosely packed soil

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.

By what primary heat transfer mechanism does the sun warm the earth?