Sunday, January 10, 2010

Thermodynamics in da House

I was thinking of something to do for my blog about therodynamics and all that, but I couldn't think of anything good so I just took a picture of some examples of thermodynamics in my house. The first thing is a toaster, since the wires on the sides of the toaster heat up, but they don't come in contact with the bread, it just transfers its heat through the air between the two, and that is what makes bread into crispy toast, conduction. Next was a lighter. I didn't know exactlty what it had to do with thermodynamics, but I know it produces fire. So since fire radiates heat, that is physics too. The last one is a thermos, and we talked about it in class, that insulates heat by seperating the inner and outer wall of the cup by air, or maybe even a vacum. Since there would be no air in a vacum, it wouldn't be able to transfer heat, so the coffee or whatever in the thermos would be close to adiabatic, but of course it will lose heat eventually, because if you leave out a thermos of hot coffee, it gets cold so sometimes physics is different in theory than real life. My thoughts on these chapters is that we read a lot of stuff in the eBook, but in class we only talk about PV diagrams, so I don't know anything about specific heat and all that, so I can't do the homework problems...just saying. Maybe next year Steelers...

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