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A piston-cylinder device contains 2.2kg of nitrogen initially at 100kPa and 25C. The nitrogen is now compressed slowly in a polytropic process during which PV^1.3 = constant until the volume is reduced by one-half. Determine the work done and the heat transfer for this process.
a 50-lb sphere with a radius of qyration of 0.4 ft is accelerated about its centroidal axis. determine the torque
The elevator E has a mass of 500kg, and the counterweight at A has a mass of 150Kg. if the motor supplies a constant force of 5KN on the cable at B, determine the speed of elevator when t= 3s, starting from rest neglect the mass of pulleys and cab..
Now suppose the mean time to failure (mf) on the expose machine is 60 hours and the repair time is exponentially distributed with a mean of 2 hours (mr). What are the effective mean and CV of the process time for a job of 60 panels?
an airplane flies at a speed of 539 mph at an altitude of 10000 ft. if the boundary layers on the wing surfaces behave
carbon dioxide enters an adiabatic diffuser at 220 ms 80 kpa and 127 degc at a rate of 1.5 kgs. if the carbon dioxide
Given a small source of spherical waves in air, for a radial distance of 10 cm, compute the difference in phase angle between pressure and particle velocity at frequency of 10 Hz. Also compute the magnitude of the specific acoustic impedance for this..
a pressure relief valve contains a poppet with a 4.20 cm2 area on which system pressure acts. during assembly a spring
If the room temperature is 15C and the temperature of the air exiting the hair dryer is 50C, what is the percent increase in the air velocity as it passes through the dryer.
the fresh feed to an ammonia production process contains nitrogen and 75 excess hydrogen in stoichiometric proportion
a thermocouple place in the mouth of a pitot tube can be used to measure the stagnation temperature of the flow. such
The maximum modulus of elasticity for a copper crystal is 195 GPa. What tensile stress is required along the corresponding crystallographic direction in order to increase the interatomic separation distance by 0.09% ?
what force would be required to start a 250lb crate sliding across a cement floor which has a coefficient of static
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