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A tank that volume is unknown is divided into two parts by a partition. One side of the tank contains 0.01 m3 of refrigerant R-134a that is a saturated liquid at 0.8 MPa, while the other side is evacuated. The partition is now removed, and the refrigerant fills the entire tank. If the final state of the refrigerant is 20°C and 400 kPa, determine the volume of the tank. Do you think this is a reversible or irreversible process?
A size 4-0 (0.15mm diameter) monofilament nylon suture was tested for its stress relaxation properties using a micro-mechanical tester at room temperature. A 20 mm sample was stretched 2 mm over a 20 second period; the force-displacement curve for th..
An inventor wants to increase the efficiency of wood burning stoves by reducing the energy lost through the exhaust stack. He proposes to accomplish this by attaching fins to the outer surface of the chimney, as shown schematically below.
a sand core used to form the internal surfaces of a steel casting experiences a buoyancy force of 23 kg. the volume of
the 4-kg collar c can slide freely along the smooth rod ab. at a given instant rod ab is rotating with an angular
consider an ideal gas-turbine cycle with two stages of compression and two stages of expansion. the pressure ratio
ore from gold mines is about 0.02 gold by mass. seawater contains gold too at about 1 part per trillion by volume. gold
a rocket has a nozzle which is expanded from a chamber pressure of 10 mpa to a pressure that is 23 of sea level
air enters the compressor of an air-standard brayton cycle with a volumetric flow rate of 60 m3s at 0.8 bar 280 k. the
an electric current of 5a passing through a resistor has a measured voltage of 6v across the resistor. the resistor is
an ideal gas undergoes a two-step process. beginning at state 1 it is pressurized at constant volume to state 2. then
an aqueous ester hydrolysis reaction a -gt b c has k 0.02 min-1 and an equilibrium constant of 10 with all
the heat input to a cold box is to be reduced by adding extruded polystyrene sheets p55kg m-3 k0.027w m-1 k-1
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