Physics, 03.01.2020 04:31 breannaasmith1122
Atube bank uses an aligned arrangement of 10-mm-diameter tubes with st = sl = 20 mm. there are 10 rows of tubes with 50 tubes in each row. consider an application for which cold water flows through the tubes, maintaining the outer surface temperature at 27°c, while flue gases at 427°c and a velocity of 5 m/s are in cross flow over the tubes. the properties of the flue gas may be approximated as those of atmospheric air at 427°c. what is the total rate of heat transfer per unit length of the tubes in the bank?
Answers: 3
Physics, 21.06.2019 22:30
The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.
Answers: 1
Physics, 22.06.2019 13:30
6–43 a food department is kept at 2128c by a refrigerator in an environment at 308c. the total heat gain to the food department is estimated to be 3300 kj/h and the heat rejection in the condenser is 4800 kj/h. determine the power input to the compressor, in kw and the cop of the refrigerator.
Answers: 2
Atube bank uses an aligned arrangement of 10-mm-diameter tubes with st = sl = 20 mm. there are 10 ro...
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