April 6

# April 6 - General Physics III poynter Homework Assignments...

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General Physics III Homework Assignments Cory poynter Homework Due Date: April 6 Problems: 19-10, 23, 25, 34, 41, 54 10) Original temperature of ring Tr = 20°C Original diameter of the inside of ring Lr =5cm Diameter of rod L=5.05cm Linear expansion α=24 x 10 - 6 /°C a) L = Lr (1 + αΔT) 5.05cm = 5cm(1 + (24 x 10 - 6 /°C)(T – 20)) T = 437°C b) Lr (1 + αΔT) = Lrod (1 + αrod ΔT) Heat transfers evenly 5cm(1 + (24 x 10 - 6 /°C)ΔT) = 5.05cm(1 + (19 x 10 - 6 /°C)ΔT) ΔT = . . 0524 05 x 10 - 6 = 2079°C T = + Tr ΔT = 2079°C + 20°C = 2099°C This is impossible for the ring to reach this temperature because if they were both being heated to a point to were the ring barely slips over the rod, the ring would melt since the ring is aluminum and has a melting point of 660°C 23) Temperature of the gas, T=20°C Pressure of the gas P = 1.013 x 105Pa Volume of the gas, V = 1m3 Mass of Avogadro number of molecules of air, M = 28.9g/mol a) = PV nRT = n PVRT = . ( ) . . ( ) n 1 013x105Pa 1m3 8 314Jmol K 293K

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## This note was uploaded on 07/13/2011 for the course PHYS 203 taught by Professor Turner during the Spring '11 term at Alabama.

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April 6 - General Physics III poynter Homework Assignments...

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