Your Questions About Homemade Solar Water Heaters

Henry Dover answers:

Thermal mass (also called heat capacity) is the capacity of a body to store heat. There are two varieties of the heat capacity Cp and Cv where Cp is ate constant pressure and Cv is at constant volume, the higher the heat capacity the more heat the substance may retain, Hydrogen has a very high heat capacity 10.16 kJ/kg*K, though it may be a bit dangerous, the next could be Nitrogen tetroxide at 4.6 kJ/kg*K, the heat capacity is a function of temperature, and will vary as the temperature changes.

Http://www.engineeringtoolbox.com/spesific-heat-capacity-gases-d_159.html

Henry Dover answers:

I would invest that pocket change to buy stock in oil companies. Then, when the next gas hike hits, i’ll turn around and sell the stock for a profit. The profit (worth more than a measly $100) can then be used for more than just a hand out to our future generations. Like say purchasing 100 acres of pristine wilderness to keep it from developers.