An 85.0-n backpack is hung from the middle of an aluminum wire, as the drawing shows. the temperature of the wire then drops by 20.0 c. find the tension in the wire at the lower temperature. assume that the distance between the supports does not change, and ignore any thermal stress.
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What are chlorofluorocarbons and what impact do they have on the atmosphere?
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Arrange the images in order to show how lake-effect snow occurs.
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Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers distance
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Air enters a gas turbine with two stages of compression and two stages of expansion at 100 kpa and 17°c. this system uses a regenerator as well as reheating and intercooling – the intercooler returns the air to the inlet temperature. the pressure ratio across each compressor is 4 ; 300 kj/kg of heat are added to the air in each combustion chamber; and the regenerator operates perfectly while increasing the temperature of the cold air by 20°c. determine the system’s thermal efficiency. assume isentropic operations for all compressor and the turbine stages and use constant specific heats at room temperature. (0.378)
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An 85.0-n backpack is hung from the middle of an aluminum wire, as the drawing shows. the temperatur...
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