A 0.6 m3 rigid tank initially contains refrigerant-134a in saturated vapor form at 0.9 MPa . As a result of heat transfer from the refrigerant, the pressure drops to 260 kPa . Use TESTCalc to answer the following questDetermine:
(a) Draw T-v and p-v diagrams
(b) The final pressure and temperature.
(c) The final volume of the refrigerant inside the piston-cylinder device. (d) The work has done during the process.
(e) The heat rejected from the refrigerant to reach its final state.

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way