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A plant has two identical standby generator units for emergency power use. In the area of the generators, the normal noise level registers 81 dBA on the sound-level meter with the generators turned off. When one generator switches on, the noise level increases to 83.6 dBA.
a. Perform calculations to determine what the dBA reading will be when the second generator also turns on.
b. If both generators are on for a full 8-hour shift, will OHSA's PEL be exceeded? Will the AL be exceeded? Explain.
Estimate the energy that must have been supplied to cause the specimen to reach failure.
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compute the number of kilograms of hydrogen that pass per hour through a 5-mm thick sheet of palladium having an area
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a 2 kg block of wood rest on the table top. A 7g bullet is shot straight up through a hole inthe table beneath the block. the bullet lodge in the block and the flies 25 cm above the table top. how fast was the bullet going initial?
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A gasoline engine is modeled as an Otto cycle. It has at temperature and pressure at the beginning of compression of 10°C and 90 kPa. The compression ratio is 7 and the specific energy added to the air during the heat addition process is 1432.46 ..
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Determine the heat transport rate of energy through an animal skull where average inside surface temperature is 95 degrees farinhiet and whose out outside surface temperature is 90 F. Assume the skull is a spherical shell 7.5 inches in outside dia..
Briefly explain the difference between fatigue striations and beachmarks in terms of both size and origin.
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