Physics, 06.09.2020 01:01 treseanthegreat
one side of a copper sheet is highly polished and the other side is painted matt black. the copper sheet is very hot and placed in a verticle position. a student places her hands at equal distances from the sheet. explain why her hands are not heated by convection
Answers: 1
Physics, 22.06.2019 00:20
Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant
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Physics, 22.06.2019 00:30
What are the theoretical properties of a gas at a temperature of 0 kelvin?
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Physics, 22.06.2019 05:20
Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1
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Physics, 22.06.2019 14:20
4r-134a enters the condenser of a residential heat pump at 800 kpa and 50°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3°c. the refrigerant enters the compressor at 200 kpa superheated by 4°c determine (a) the isentropic efficiency of the compressor, (b) the rate of heat supplied to the heated room, and (c) the cop of the heat pump. also, determine (d) the cop and rate of heat supplied to the heated room if this heat pump operated on the ideal vapor-compression cycle between the pressure limits of 200 and 800 kpa. (0.757, 4.37 kw, 5.12, 6.18, 3.91 kw)
Answers: 3
one side of a copper sheet is highly polished and the other side is painted matt black. the copper s...
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