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A refrigerator in a kitchen at 20 degrees Celsius uses R-134a. The freezer is to be kept at -5 degrees Celsius or cooler. What is the maximum pressure that can be used in the evaporator? Why?
for your sink at home the flow rate in is 5000 unitshr. accumulation is 2500 units. what is the accumulation rate if
Consider the classical adiabatic saturation process in which a stream of is mixed adiabatically and isobarically (T1)with a stream of liquid water in order (T2) to become a saturated air +water vapor mixture . Show that the adiabatic saturation tempe..
1 water at 15 degrees celcius flows through a nozzle that contracts from a diameter of 10cm to 2cm. the exit speed is
A small fan moves air at a mass flow rate of 0.004 lbm/s. Upstream of the fan the pipe diameter is 2.5 in., the flow is laminar, the velocity distribution is parabolic, and the kinetic energy coefficient 1, is equal to 2.0. Downstream of the fan, the..
2 kg of saturated vapour water and 8 kg of saturated vapour refrigerant-134a both at 100 kPa. Which substance will release more energy to completely condense the vapour? Explain
a scuba divers 2 ft3 air tank is to be filled with air from a compressed air line at 120 psia and 100 degree f.
The humidity of air can be determined by use of two different thermometers; a 'dry bulb' thermometer and a 'wet bulb' thermometer. explain how these thermometers can be used to estimate the amount of water vapour in the air.
a freezer is 1 m wide and deep and 2 m high and must operate at -10 degree c when the ambient air is at 30degree c.
a heat-engine of 32 thermal efficiency is used to drive a refrigerator having coefficient of performance of 5.
suppose that you want to design a column to support a uniform compressive stress stress naught. if the columns cross
four vectors ab c and d are shown not to scale. vector a has magnitude 22.5 and acts at an angle of 14.9 degrees with
what is the velocity of the cart when the bullet becomes embedded int he terget? during the firing, the man remains at the same position on the cart. neglect rolling resistance of the cart.
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