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A 0.12m^3 rigid tank contains saturated refrigerant R134a at 800kPa. Initially 25 percent of the volume is occupied by liquid and the rest by vapor. A valve at the bottom of the tank is now opened and liquid is withdrawn from the tank. Heat is transferred to the refridgerant such that the pressure in the tank remains constant. The valve is closed when no liquid is left in the tank and vapor starts to come out. Determine the total heat transfer for this process.
a 2 cm by 2 cm by 2 cm rubber engine mount e 30 mpa poisson ratio 0.4999 must support a 300 kg motor. what maximum
for a piece of aluminum stock choose a grinding wheel that will grind .050 of stock from it. show the grinding wheel
A cylindrical specimen of this alloy 24 mm in diameter and 186 mm long is to be pulled in tension. Calculate the force necessary to cause a 0.0119 mm reduction in diameter. Assume a value of 0.33 for Poisson's ratio.
Electricity might be used to run the fan to draw air through the system, and also to run a chiller - What is a typical COP for a commercial chiller?
a dredger is pulling sand from the bottom of a harbor and loading it onto a barge. the sand sg 2.6 leaves the dredger
a heat engine power cycle is operating on a carnot cycle and has a thermal efficiency of 75. the waste heat from this
a pressure cooker cooks a lot faster than an ordinary pan by maintaining a higher pressure and temperature inside. the
an ideal diesel cycle has r23 and rc1.86. determine the specific net-work i.e. net-work per unit mass flow in terms of
determine the mass and the weight of the air contained in a room whose dimensions are 6m x 6m x 8m. assume the density
An Industrial water shutoff valve is designed to operate with 30lbs of force and will encounter 200lbs of resistance force applied to a 1.5in diameter axle. What is the required actual mechanical advantage of the system?
camera company x is deep in the design process of their newest camera system. they are very concerned with the quality
a pure jet engine propels an aircraft at 250 ms through air at 45 kpa and -13 degc. the inlet diameter of this engine
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