Physics, 20.09.2020 07:01 sylviaswanson1
Flow of heat energy through liquids and gasesTransfer of heat through soil by the movement of moleculesWarm air in atmosphere rises and is replaced by cooler air Conduction Heat energy transferred Convection Radiation Heat energy on Earth escapes into space Conduction & Convection Conduction & Radiation Convection & Radiation All
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Physics, 21.06.2019 20:00
Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? burning fossil fuels contributes to climate change. burning fossil fuels takes place inside expensive fuel cells. fossil fuels aren't widely available, but pure hydrogen is. fossil fuels are nonrenewable.
Answers: 1
Physics, 22.06.2019 10:00
Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.
Answers: 2
Physics, 22.06.2019 10:40
Two point charges are on the y axis. a 3.90-Āµc charge is located at y = 1.25 cm, and a -2.4-Āµc charge is located at y = ā1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v
Answers: 1
Physics, 22.06.2019 14:20
4r-134a enters the condenser of a residential heat pump at 800 kpa and 50Ā°c at a rate of 0.022 kg/s and leaves at 750 kpa subcooled by 3Ā°c. the refrigerant enters the compressor at 200 kpa superheated by 4Ā°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
Flow of heat energy through liquids and gasesTransfer of heat through soil by the movement of molecu...
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