ef152-rec-5-4 - EF 152 Physics for Engineers Spring, 2009...

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EF 152 – Physics for Engineers Spring, 2009 1 Recitation 5.4 Heat Engines Task 1. Review waves and sound. Let out a loud shout while doing the wave! There are no concept questions for this recitation. Task 2: Heat Engine Run the heat engine through a couple of cycles to show its operation. Start with the air chamber in the cold bath. The cycle is as follows: i. Place the weight on the piston. ii. Put the air chamber in the hot bath. iii. Remove the weight. iv. Put the chamber back in the cold bath. This is an example of a basic heat engine. We could use this concept as an elevator, to lift either people or materials, to a higher elevation. Task 3: Perform the following tasks related to Step 1 of the heat engine. Basic properties of heat engine: Mass of piston and platform: 35.0g Weight = 0.343N Piston diameter: 32.5mm Area = 829.6mm 2 Air chamber: Length: 138mm Diameter: 38mm Volume: 156500mm 3 a. Unhook either the pressure sensor or air chamber, and raise the piston about 1/3 of the way up. Lock the piston in place. Reconnect the pressure line and release the piston. Start data collection. b. Place 300 g of mass on the piston. Record the piston height using the graduations on the side of the cylinder, and the pressures. Also record the ambient temperature. Absolute Temp (K): _________________ State Piston Height (mm) Absolute Pressure (kPa) Volume (mm 3 ) No mass (A) 300 g mass (B) Compare the measured pressure difference to the calculated pressure. Difference in pressure readings:
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This note was uploaded on 04/07/2009 for the course EF 152 taught by Professor Ab during the Spring '08 term at University of Tennessee.

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ef152-rec-5-4 - EF 152 Physics for Engineers Spring, 2009...

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