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A pot of water is boiling on a stove supplying 325 W to the water. What is the rate of mass (kg/s) vaporizing assuming a constant pressure process?
a 1 kg block of copper at 350degc is quenched in a 10 kg oil bath initially at ambient temperature of 20degc.
it is known that normal stress sigma-y 68mpa and shear stress tau-xy -100mpa. using mohrs circle determine the
0.75 kg of Refrigerant 134-a is compressed in a compressor from 160 kPa and -10°C to 1.2 Mpa and 50°C, steadily. Determine the change in flow exergy of the refrigerant during this process, if the environment is at 100 kPa and 25°C.
the following figure shows the schematic diagram of a vapor compression refrigeration system using r-134a as the
A building has a calculated cooling load of 24 tons, of which 6 tons is latent load. The space is to be maintained at 72 F db and 50% relative humidity. 15% by volume of the air supplied to the space is outdoor air at 95 F db and 65% relative humidit..
a 20 cm diameter sphere is made of a heat-generating material that produces 106 wm3. the sphere is cooled by 20oc air
Horsepower and efficiency of three-phase motor, If a fully loaded 440V, three-phase motor draws 12.4 A at 86% power factor (pf). It's speed is 1730 rpm and its torque output to a mechanical load is 29.1 lb-ft x 1.356 = 39.5 Nm.
a a steel made up of 100 martensite is completely tempered to give an equilibrium composition consisting of 85 wt
A Steam-powered catapult on an aircraft carrier accelerates a 16000-kg aircraft from zero to 320 km/h in 2 seconds. Assume that the acceleration is constant. A) Determine the work done by the catapult on the aircraft. B) Determine the kinetic energy ..
A piston-cylinder assembly contains saturated water vapor at T = 200C. The surrounding air is at 35C. Heat transfer occurs from the system until the cylinder contains saturated liquid water at T = 200C. Can this process be modeled as a reversible pro..
Explain why tempering cycle is essentially required in the heat treatment of high tensile carbon steel and what are the consequences if tempering cycle is not carried out?
An electric heater heats air. The temperature sensor has a time constant of 5 seconds. The air temperature output (in °C), as measured by the temperature probe is: T=200+cos(0.5t)
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