What is the water in the hot water bag?
Water, iron and ferrite by electrothermal electromagnetic energy, in order to prevent the leakage of electromagnetic stuff is closed, will produce electricity magnetic iron and magnetic interaction is, the so-called "water" which produces eddy current and hysteresis and then produce heat energy, and transformer why fever is relevant because of hysteresis and eddy current and thermal, transformer manufacturers to make a piece of silicon steel sheet is to reduce the hysteresis and eddy current, by heat, and heating water bag on the contrary. But be careful when using it.
Hot water in the ordinary hot water bag.You say is the hand warmer in the water, warm bag of liquid that is supersaturated solution of sodium acetate (sodium, acetate, CH3COONa) is a kind of supersaturated solution. Supersaturated solution is a certain temperature, pressure, when the concentration of solute in the solution has exceeded the temperature, pressure, the solubility of the solute, and the solute is still not the phenomenon of excessive precipitation phenomenon. Warm hand treasure inside the liquid is the liquid, and some people say that water is not water, is a solution.
Some are chemical, conductive. Now the Internet has a special hot water bags, ordinary pure water on the line, and security. This is what I use
