A piece of experimental apparatus. Fig. P1.54. is located where g = 9.5 m/s 2 and the temperature is 5 ° C . Air flow inside the apparatus is determined by measuring the pressure drop across an orifice with a mercury manometer (density = 13580 kg/m 3 ) showing a height difference of 200 mm. What is the pressure drop in kPa?
A piece of experimental apparatus. Fig. P1.54. is located where g = 9.5 m/s 2 and the temperature is 5 ° C . Air flow inside the apparatus is determined by measuring the pressure drop across an orifice with a mercury manometer (density = 13580 kg/m 3 ) showing a height difference of 200 mm. What is the pressure drop in kPa?
A piece of experimental apparatus. Fig. P1.54. is located where
g
=
9.5
m/s
2
and the temperature is
5
°
C
. Air flow inside the apparatus is determined by measuring the pressure drop across an orifice with a mercury manometer (density
=
13580
kg/m
3
) showing a height difference of 200 mm. What is the pressure drop in kPa?
A flat-plate solar collector is used to heat water by having water flow through tubes attached at the back of the thin solar absorber plate. The absorber plate has emmisssivity and an absorptivity of 0.9. The top surface where x=0 temp of the absorber is T0=35 degrees C, and solar radiation is incident on the basorber at 500 W/m^2 with a surrounding temp of 0 degrees C. The convection heat transfer coefficient at the absorber surface is 5 W/m^2 K, while the ambient temp is 25 degrees C. Show that the variation of the temp in the basorber plate can be expressed as T(x)=-(q0/k)x+T0, and determine net heat flux, q, absorbed by solar collector.
Using properties of a saturated water, explain how you would determine the mole fraction of water vapor at the surface of a lake when the temp of the lake surface and the atmospheric pressure are specified.
Consider a glass of water in a room at 15 degrees C and 97 kPa. If the relative humidity in the room is 100 percent and the water and the air are in thermal and phase equilibrium, determine the mole fraction of the water vapor in the air and the mole fraction of air in the water.
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