PHYS153_10W_Expt4

PHYS153_10W_Expt4 - Physics 153 Experiment 4 (1 week) rev....

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Physics 153 Experiment 4 (1 week) rev. Feb. 15/11 Compression of Gas and Strain Gauge Equipment provided: 10 ml syringe, sealed at one end. Pressing apparatus with load cell (i.e. strain gauge, which changes its resistance with strain), see Figs. 1-3. The output of the strain gauge is connected to the amplifier with plastic enclosure. The amplifier produces a voltage proportional to the strain on the load cell. A multimeter, used to measure the above voltage. Plastic ruler Various masses power supply to provide dc voltage for electronics Theoretical Background In the first term of Physics 153 we discussed (a) the ideal gas law, PV = nRT, and (b) isothermal and adiabatic compressions. In the case of an ideal gas undergoing isothermal compression, PV = constant (nRT); for adiabatic compression, PV γ = constant. Remember: n = number of moles, R = 8.315 J/mol K is the gas constant, and γ is the ratio of the heat capacities γ = C p /C v . Note, for air γ = 1.40 and C
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This note was uploaded on 03/02/2011 for the course PHYS 153 taught by Professor Measday during the Spring '08 term at UBC.

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PHYS153_10W_Expt4 - Physics 153 Experiment 4 (1 week) rev....

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