... This topic stresses mechanical energy, potential and kinetic, and also describes conversion between types of energy (while conserving the total amount), units, and the special position of heat. ... This lesson plan supplements: "Energy," section #15 http://www.phy6.org/stargaze/Senergy.htm . ... 18d: Work Against an Electric Force: The Van De Graaff generator . ... The conservation of energy in its conversion from one form to another. Units of energy--Joule, calorie, also watt and kilowatt-hour. ...