Physics, 06.12.2019 05:31 mshields1994
Which one of the following statements concerning the stefan-boltzmann equation is correct? the equation can be used to calculate the power absorbed by any surface. the equation applies only to perfect radiators. the equation applies only to perfect absorbers. the equation is valid with any temperature units. the equation describes the transport of thermal energy by conduction.
Answers: 3
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What is the energy of a photon of ultraviolet radiation with a frequency of 4.4 × 1015 hz? planck’s constant is 6.63 × 10–34
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Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above
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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
Which one of the following statements concerning the stefan-boltzmann equation is correct? the equa...
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