Physics, 13.05.2021 18:30 markusblazer
2. A worker uses an ideal machine to lift a 15 N weight a distance of 4.50 m. He uses a force of 7 N. How far does the effort force move? (2)
Answers: 3
Physics, 21.06.2019 14:40
Astring that is fixed at both ends has a length of 1.05 m. when the string vibrates at a frequency of 91.0 hz, a standing wave with five loops is formed. (a) what is the wavelength of the waves that travel on the string? (b) what is the speed of the waves? (c) what is the fundamental frequency of the string?
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Physics, 22.06.2019 10:30
Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.
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If a nissan titan has a mass of 2,300 kilograms how many grams is that
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2. A worker uses an ideal machine to lift a 15 N weight a distance of 4.50 m. He uses a force of 7...
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