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Unformatted text preview: other pure substances we’ve studied so far, are (approximately) incompressible. It simpliﬁes our analysis to assume that they are completely incompressible, which means that we can treat density, ρ, as independent of P and T. • ρ = 1/v, so v is also independent of P and T • Also, cp = cv = c, which is constant. (Solids are easy!) Example A square silicon chip has dimensions 1mm x 1mm and a thickness of 300 μm. The chip is cooled from room temperature (~70 °F) to 4K using liquid helium. Es...
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 Fall '08
 wang

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