The energy stored in the motion or vibration of molecules in a substance is a definition for a. heat. b. work. c. radioactivity. d. electromagnetism.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms