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Nitrogen in a piston-cylinder assembly undergoes a polytropic expansion process. Initially, nitrogen is at 125 C and 144 kPa. Then it is expanded to a state of 102 kPa and 90 C. determine the heat transfer and work for the process considering no change in Kinetic or Potential energy.
A slow leak develops in an inner tube (volume, 0.5 ft3, temperature, 600F), wherein it takes 4 hours for the pressure to decrease from 30 to 25 psig. The mass flow rate of air per second under the conditions is given by 0.68pA/(RT)0.5, where the unit..
Explain how you would expect the strength and ductility of a crystalline material to change as the ASTM Grain size number change from 14 to 3.
Evaluate the concentration of vacancies in copper at 650C temperature. What temperature will be needed to heat treat copper such that the concentration of vacancies produced will be 1000 times more than the equilibrium concentration of vacancies at s..
Air at standard temperature and pressure flows through a horizontal galvanized iron pipe at a rate of 4.0 ft3/s. The pressure drop must not exceed 0.75 psi per 100 ft of pipe (and naturally we want to design the most economic pipe). What diameter sho..
What is the composition, in weight percent and atom percent, of an alloy that contains 105.0 kg iron, 20.3 kg of aluminium, and 2.0 kg of copper?
An insulated piston-cylinder assembly containing a fluid has a stirring device operated externally. The piston is frictionless, and the force holding it against the fluid is due to standard atmospheric pressure and a coil spring. The spring constant ..
A piston cylinder device initially contains 0.15-kg steam at 3.5 MPa, superheated by 5 C. Now the steam loses heat to the surroundings and the piston moves down, hitting a set of stops at which point the cylinder contains saturated liquid water. the ..
If have to do a material selection case study for a rice cooker outer body where can I find the necessary requirement specifications of the material?
For a tall column resting on the ground, axial stress develops due to the columns weight. (a) Derive the stress as a function of position z measured from the bottom of the column, and the total contraction of the column.
A system consists of liquid nitrogen in equilibrium with nitrogen vapor. How many phases are present? The system undergoes a process during which all of the liquid is vaporized. Can the system be viewed as a pure substance during the process? Explain..
Finding exit velocity from air nozzle, Air enters a nozzle operating at steady state at 800 ºR with a negligible velocity and exits the nozzle at 570 ºR.
problem 1 a 10-minute experimental run shows that 75 of liquid reactant is converted to product by a half-order rate.
you balanced a pump impeller by placing a 5 gram weight at a radius of 100 mm. the original vibration amplitude was 10
a solar collector is used to dry biomass in a storage bin. outside air at 35o and 60 rh enters the collector and is
steel is coated with thin layer pf ceramic to help protect against corrosion. what do you expect to happen to the
the ball of mass m of negligible size is fired up the vertical circular track using the spring plunger. the plunger
steam at 1000 lbfin2 600 f enters a valve operating at steady-state and undergoes a throttling process. let to70 f and
The Cost of Recharging a Battery, A 12-V automotive storage battery is charged with a constant current of 2 amp for 24 hr.
at the beginning of the compression process in an ideal otto cycle air is at 95 kpa 27 degree c and the temperature at
a wire-plate electrostatic precipitator esp designed for a commercial application for removing atmospheric particles
A cylindrical pressure vessel of 120 in diameter outside, used for processing rubber, is 36 ft. long. If the cylinder portion of the vessel operates at 120 psi internal pressure, what are the stresses acting on an element at the inside surface of the..
argon in the amount of 0.6 kg fills a 0.05 m3 piston cylinder device at 550 kpa. the piston is now moved by changing
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