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Air contained in a rigid, insulated tank fitted with a paddle wheel, initially at 4 bar, 40oC and volume of 0.2 m^3, is stirred until its temperature is 500 K. Assuming the ideal gas model for the air, determine the amount of entropy produced, in kJ/K. Assume variable specific heats (data from Table A-22).
a closed cylindrical storage tank contains gas under pressure p and has an inner diameter of 24 in. and a wall
a beer distributor incurs a penalty cost of 2.00 per case of shortage and 1.00 charge per case left over in inventory
if a football is kicked at a 45 degree angle determine its minimum initial speed va so that it passes over the goal
Assume that a diaphyseal cross section carries a bending moment M. Let the cross section be circular with inner and outer diameter of 20 and 30 mm, respectively, and assume that the neutral axis (NA) passes through the centroid. Draw the cross sectio..
air as an ideal gas is compressed from a state where the pressure is 0.1 mpa and the temperature is 27o to a state
The average temperature of the human body is 98.6°F. Calculate the maximum rate of heat transfer per unit area by radiation from the human body in a room that is at 50°F. What is the percent increase in the heat transfer if rate you are running a fev..
the 300 kg and 400 kg mine cars are rolling in opposite directions along the horizontal track with the respective
Draw the T-s diagram (hint: it would help to begin with a schematic of the cycle) and.
steam enters an adiabatic turbine at 400c and 2mpa pressure. the turbine has an isentropic efficiency of 0.9. the exit
a well-insulated control volume operates at a steady state and has one inlet location 1 and two outlets locations 2 and
refrigerant r-134a flows through a refigeration system at a rate of 0.12 kgs . at the entrance to the adiabatic
the spring-loaded piston-cylinder device is filled with 0.5 kg of water vapor that is initially at 4 mpa and 400oc.
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