Chemistry_1031_day22_032009_actual

Chemistry_1031_day22 - Dr Jonathan M Smith Friday March 20 Energy Units Types Energy flow Read Chapter 6 section 13 In class exam next Wednesday

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Dr. Jonathan M. Smith Friday, March 20
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y Energy y Units y Types y Energyflow y Read Chapter 6 section 1 3 y In class exam next Wednesday y Example questions will be posted with solutions following y Similar format
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In 1812 a man called Charles Redheffer appeared in Philadelphia. He had with him a miraculous perpetual motion machine that required no source of energy to run. Or so he claimed. He set up a working model of this machine on the outskirts of the city, near the banks of the Schuylkill River, and displayed it to curious Philadelphians. He also applied for funds from the city government to build a larger version of the machine. On January 21, 1813 eight city commissioners visited Redheffer. Their intent was to inspect his machine in order to determine whether he should be granted the funds he had requested. Redheffer carefully watched them during their inspection, and he stopped them whenever they tried to get too close to the machine, claiming that he was concerned they might damage it. Nevertheless, one of the inspectors still managed to notice something strange about the machine: it was not working in the way that Redheffer claimed that it worked. Redheffer had explained to the inspectors that his perpetual motion machine was providing the energy to power another, separate machine through a set of interlocking gears. However, the inspector noticed that the gears of the perpetual motion machine were worn in the wrong direction if it was really powering the other device. Instead, it was clear that power was being routed to the perpetual motion machine from the other machine. Instead of openly challenging Redheffer on this point, the commissioners decided on a more subtle method to expose him. They instructed a local engineer, Isaiah Lukens, to build a machine that worked on the same principles as Redheffer's machine, but whose power source was even more ingeniously hidden (Lukens's machine is still owned by the Franklin Institution in Philadelphia). Then they displayed this machine to Redheffer.
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This note was uploaded on 05/09/2010 for the course CHEM 1031 taught by Professor Thomas during the Spring '06 term at Temple.

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Chemistry_1031_day22 - Dr Jonathan M Smith Friday March 20 Energy Units Types Energy flow Read Chapter 6 section 13 In class exam next Wednesday

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