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A steel bottle V = 0.1 m3 contains R-134a at 20°C, 200 kPa. It is placed in a deep freezer where it is cooled to -20°C. The deep freezer sits in a room with ambient temperature of 20°C and has an inside temperature of -20°C. Find the amount of energy the freezer must remove from the R-134a and the extra amount of work input to the freezer to do the process.
the cage of a mine hoist descends part of a shaft with an acceleration of 1 ms2 and the remainder of the distance with
an alcohol manufacturing facility emits air with 500 ppm ethanol. the air flows out several roof vents at a total flow
a 1700 kg car starts from rest at position a and accelerates uniformly up the incline reaching a speed of 100 kmh at
A piston-cylinder assembly contains a two-phase liquid-vapor mixture of H2O at 200 lbf/in^2 with a quality of 80%. The mixture is heated and expands at constant pressure until a final temperature of 480 F is reached. Determine the work for the proces..
Suggest a reasonable number of significant digits for reporting the following common values and give some indication as to your reasoning: a. Your body weight for a passport b. A car's fuel usage (use liters per 100 km) Strain gauge Eo Excitation vol..
Both cars undergo constant acceleration. Determine the time when the two cars pass each other on the highway.
A bar of 12 mm diameter gets stretched by 3 mm under a steady load of 8 kN. What stress would be produced in the bar by a weight of 800 N, which falls through 80 mm before commencing the stretching of the rod, which is initially unstressed. TakeE=..
Determine the balanced reaction equation. For the CO and SO2, determine the amount, in kmol per 106 kmol of combustion products (that is, the amount in parts per million).
Effect of pressure on temperature and density of air for an adiabatic process, The pressure is to be raised from atmospheric to 7 psi (4.83 bar). The process is adiabatic, and the volume is constant and unknown.
Determine the temperature of the electric heater element and drawing of the temperature profile.
given temperature of the hot loop tin36.70c tout73.738c hot flow 2.985 galmin temperatures of the cold loop tin 14.42c
air at 110 kpa and 250 k is compressed steadily to 570 kpa and 400 k. the mass flow rate of air through the compressor
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