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.... You happen to come across a piece of metal which has a density of rho = 7.6

ID: 2245662 • Letter: #

Question

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You happen to come across a piece of metal which has a density of rho = 7.66 g/cm3 when the temperature is To = 55.0degreeC. If the metal is cooled to a temperature of T1= 0.00 degree C does the density change? Yes, the density will decrease since the volume changes. Yes, since the metal contracts and the mass is constant the density will increase. No, density does not depend on temperature. No. because as the volume changes so does the mass. Calculate the density of the piece of metal at this temperature. p1. The coefficient of volume expansion for this piece of metal is beta = 6.27 Times 10-5 1/degree C.

Explanation / Answer

rho1=rho/(1-beta*T)= 7.66/(1-6.27E-5*55) = 7.6865 gm/cc