It seems like forever since I've last visited this page. It has been awhile. I've been revising the third book in, "The Adventures of Curtis, Connie, and Cosmic Cat." I've also been working on getting reviews of the first book, "Astronaut Training." Anybody want to do a review? I expect to have some additional reviews start showing up in the very near future. Anybody that has read my book hopefully will do a review.
As long as I'm here I might as well insert one of my Science Snippets.
Why does a refrigerator get cold?
When a liquid is forced through a small hole (orifice) into an area of reduced pressure the liquid expands and usually turns into a gas or at least into a cloud of droplets. It takes work for this to happen. Work is a form of energy which is taken out of the closed system. The result is that the gas is at a significantly lower temperature than the initial liquid. The resulting cold gas is circulated through the refrigerator coils and cools the refrigerator. Excess heat is transferred to the air around the refrigerator by external coils. The transfer of heat to the air allows the circulating gas turns back into a liquid to continue to get colder and subsequently cooling the refrigerator.
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