Afan is to be selected to ventilate a bathroom whose dimensions are 2 m 3 3 m 3 3 m. the air velocity is not to exceed 8 m/s to minimize vibration and noise. the combined efficiency of the fan–motor unit to be used can be taken to be 50 percent. if the fan is to replace the entire volume of air in 10 min, determine (a) the wattage of the fan–motor unit to be purchased, (b) the diameter of the fan casing, and (c) the pressure difference across the fan. take the air density to be 1.25 kg/m3 and disregard the effect of the kinetic energy correction factors.
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Physics, 22.06.2019 16:00
Amichelson interferometer operating at a 600 nm wavelength has a 3.02-cm-long glass cell in one arm. to begin, the air is pumped out of the cell and mirror m2 is adjusted to produce a bright spot at the center of the interference pattern. then a valve is opened and air is slowly admitted into the cell. the index of refraction of air at 1.00 atm pressure is 1.00028.how many bright-dark-bright fringe shifts are observed as the cell fills with air?
Answers: 1
Physics, 22.06.2019 18:00
Wind and moving water provide energy. question 1 options: chemical mechanical thermal none of the above
Answers: 1
Afan is to be selected to ventilate a bathroom whose dimensions are 2 m 3 3 m 3 3 m. the air velocit...
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