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A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 390 kPa and 140 degrees C. Determine the heat loss or gain during this process.
a gas within a piston-cylinder assembly undergoes a thermodynamic cycle consisting of three processesprocess 1-2
a gas stream produced as a by-product of a petroleum processing operation is to be used as a fuel in a small electric
to find the minimum distance b to get the ball over the top im not sure weather you use conservation of mech energy or
Consider 6.0 kg of austenite containing 0.45 wt% C, cooled to below 727 degrees Celcius (1341 degrees Farenheit).
solar energy reaching the earth is about 1350 wm2 outside the earths atmosphere and 950 wm2 on earths surface normal to
estimate the density of an aluminum-magnesium alloy used for soda cans as a weighted average of the densities of
given the initial volume is 10 ft3 and a system expands to 20 ft3 and the system has an initial pressure of 14.7 psi
The homogeneous gate with mass M , length L, width, b, and thickness, t, is used to regulate the height, H of the water in a reservoir. Determine an expression for the mass of the gate as a function of the known variables. What is the angle of the ga..
in a tow stage elongation of specimen the length is first increased from lo to l1 and then from l1 to l2. write down
calculate the exergies of two closed systems respectively 1 kg of steam at 800 kpa and 180 degc and 1 kg of r-134a at
assuming that r-134a is an ideal gas what would the specific volume of r-134a at 40 deg c and 0.06 mpaabsolute? how
the main shaft of a particular machine is to continuously transmit 25.0 ft-lbs of torque say along the z-axis. it is
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