Answers: 1
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.
Answers: 2
Physics, 23.06.2019 07:30
Aspring has a relaxed length of 33 cm (0.33 m) and its spring stiffness is 6 n/m. you glue a 76 gram block (0.076 kg) to the top of the spring, and push the block down, compressing the spring so its total length is 15 cm. you make sure the block is at rest, then at time t=0 you quickly move your hand away. the block begins to move upward, because the upward force on the block by the spring is greater than the downward force on the block by the earth. calculate y vs. time for the block during a 0.09-second interval after you release the block, by applying the momentum principle in three steps each of 0.03-second duration.
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Physics, 23.06.2019 10:10
The heat fusion is the amount of heat required to__ a- evaporate 1 g of liquid into gas b-make a substance subliminate c- melt 1g of solid into liquid d-make material combust
Answers: 2
Why is a screw a kind of inclined plane...
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
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Biology, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57
Mathematics, 13.06.2020 07:57