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Air in a piston-cylinder assembly expands slowly from an initial state where the pressure is 250 kPa and the volume is 0.02 m3 to a final state where the volume is 0.1 m3 and the temperature is 500 K. The pressure of the gas varies linearly with volume during the process and ideal gas behavior can be assumed for air. Determine the heat transfer if the mass of air is 0.07259 kg.
determine the maximum theoretical speed that may be achieved over a distance of 360ft by a car of weight w starting
a large coal fired power plant has an efficiency of 45 and produces net 1500 mw of electricity. coal releases 25000
at room temperature 23oc a cylinder of steel has a diameter of 15.02 mm which is too large to fit into a 15 mm diameter
nitrogen gas at 60 kpa and 7 degrees celsius enter an adiabatic diffuser steadily with a velocity of 195 ms and leaves
An unsuited free diver can work in a pressure of up to 490KN/m^2 and a suited diver in pressure of up to 1815 KN/m^2. Calculate the maximum depths at which they might work in sea-water which has a specific gravity of 1.03.
What are stress concentrations, what causes them, and why should engineers be concerned about them?
For the process where q= 62.5 kj/kg and wkcs= 60 kj/kg determine the energy change if the system mass is 2 kg.
the portion of the truss shown represents the upper part of a power transmission line tower. for the given loading
how long would it take to use up current reserves? suppose the total resource is five times current reserves; if the use rate continues to grow at 2.6 percent, how long would it take to use up the resource?
how would you use a pulley system with one rope to pull at a single item at two points simultaneously?the free ropes of
you are requiredto heat treat samples of al 2024 to a t6 condition but you dont know what heat treating schedule to
5 kg of air initially at 10oc and 100 kpa is in piston-cylinder device. initially the piston is resting on a set of
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