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A refrigeration cycle uses refrigerant 134-a as the working fluid. The refrigerant enters the expansion valve as a saturated liquid at 1.00 MPa and exits the valve at a pressure of 200 kPa. What is the temperature at the exit of the valve in oC? what is the internal energy (kJ/kg) of the refrigerant at the exit of the valve?
a fairing for an optically perfect window for an airborne telescope is being tested in a wind tunnel. a manometer is
the system is at rest in the position shown with the 12-lb collar a resting on the spring k 20 lbft when a constant
water is the working fluid in a vapor power cycle. the pressure and temperature at the turbine inlet are 1600 psia and
Determine the minimum no of teeth required on pinion in order to avoid interference which is to gear with 1 a wheel to give a gear ratio of 3 to 1
Determine the force in each of the members connecting joints A through F of the vaulted roof truss shown. State whether each member is in tension or compression.
suppose you are outside on a cold day with no gloves. assume your hands have an area of 0.01 m2. the temperature of
A plate, 0.001 in distant from a fixed plate, moves at 2 feet per seconds and requires a force of 0.04l bar per feet square to maintain this speed. determine the fluid viscosity of the substance between the plate.
the pressure of 200 kgs of water is to be increased from 1 atm to 4 mpa. the water enters through a 20-cm-diameter pipe
a 20 kg object is pulled across a flat surface with a force of 100 n. the force is applied at a 30deg angle to the
one of the problems of wind tunnel testing at airspeeds near sonic speed is the large effect on the flow conditions of
Steam at 1000kPa and 300deg C expands to a pressure of 150kPa in a cylinder. If PV = constant during the process, calculate W, Q and delta S for the process.
heated air at 1 atm and 100 degrees f is to be transported in a 400 ft long circular plasitc duct at a rate of 12ft3s.
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