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A 2-m^3 rigid tank initially contains air at 100 kPa and 22 degrees C. The tank is connected to a supply line through a valve. Air is flowing in the supply line through at 600 kPa and 22 degrees C. The valve is opened, and air is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. A thermometer placed in the tank indicates the air temperature at the final state is 77 degrees C. Determine (a) the mass of the air that has entered the tank and (b) the amount of heat transfer.
for the vapor power cycle steam enters the at 3 mpa and 500 c and leaves at 70 kpa and 200 c. the system is operating
the rigid bar ac is supported by a pin at f and two identical links bd and ce. the length between point a and b is 22
a rigid tank contains 20 lbm of air at 20 psia and 70degf. more air is added to thenbsptank until the pressure and
It is known that the kinetics of recrystallization for some alloy obey the Avrami equation, and that the value of n in the exponential is 8.4. If, at some temperature, the fraction of recrystallization is .30 after 100 min, determine the rate of r..
two tanks are connected by a valve. tank a contains air at 200 kpa volume of a 0.5 m3 and temperature of a 30oc. tank
a flame that produces 10kw of heat output is applied to one side of a 10cm by 10cm square of aluminum foil. the other
A wheel barrow is used to lift a 200 lb load. The length from the wheel axle to the center of the load is 2 ft. The length from the wheel and axle to the effort is 5 ft. 5. What is the ideal mechanical advantage of the system?
a piston cylinder device initially contains steam at 200 kpa 200 degree c and 0.4 m3. at this state a linear spring is
a syringe has diameter d 4 cm and its piston is pressed with the force f 30 n. find the maximum velocity of the water
a 0.2-cm-thick 10-cm-high and 15-cm-long circuit board houses electronic components on one side that dissipate a total
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
the hydraulic jack shown below consists of a master cylinder with a diameter of 60mm and a lifting or slave cylinder
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