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An ideal gas having a constant specific heat undergoes a reversible polytropic expansion with exponent, n = 1.4. If the gas is carbon dioxide will the heat transfer for this process be positive, negative, or zero?
ten kilograms of ice at 260 k is duped into 20 kg of liquid water initially at 300 k in an insulated container. the
An aluminium bar is subjected to uniaxial tensile loading. If the lateral strain (perpendicular to the load direction) is measured to be -0.00025, determine the axial stress required to induce this strain (round to the nearest ksi).
The shaft of a rolling machine is driven by means of a motor placed horizontally. The flywheel which also acts as a pulley is of 1.5 m diameter and has belt tension 5.4 kn and 1.8 kn on tight and slack side respectively.
A system contains a substance that is initially at 100 °C and 1 MPa and it later at 0 °C and 100 kPa. Determine the change in specific enthalpy for the process if the unknown substance is: a) liquid kerosene, b) helium gas (He), c) solid aluminium (A..
design a worm gear set to reduce the speed of a 1475 rpm electric motor to approximately 60 rpm and apply 170 nm torque
The final pressure is 5 kpa . If specific internal energy of the gas decreases by 40 kj/kg, find the heat transfer in magnitude and direction.
while driving your car hits a pothole blowing your front tire. taking out your lug wrench total span 28 in you try to
A bird flying at a constant speed at an altitude 100 m is being tracked by a person located directly below the line of flight. If this angle is decreasing at 0.02 rad/s when the angle between the horizon line and the line of site is 45 degrees.
A piston-cylinder assembly contains 2 lbm of water, initially at 100 lbf/in.2 and 400 F. The water undergoes two processes in series: a constant pressure process followed by a constant volume process. At the end of the constant volume process, the te..
Analyze the slope problem that we did in class today using all 5 methods the software offers, using a standard 1.5 factor of safety. Compare the results with the Ordinary Method of Slices Factor of Safety.
Assume that the average life expectancy of a Beagle is 13.3 years, and that 60% of Beagles lives to 12 to 15 years, and that their age follows normal distribution. Calculate the standard deviation of the distribution.
a power plant burns gas with hhv of 55000 kjkg to generate electricity of 10 mw. if the overall efficiency is 40 how
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