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A piston-cylinder device initially contains 1.2 kg of steam with a volume of 0.2 m3. The mass of the piston is such that it maintains a constant pressure of 1.0 MPa. The cylinder is connected through a valve to a supply line that carries steam at 5.0 MPa and 500 °C. Now the valve is opened and steam is allowed to flow slowly into the cylinder until the volume of the cylinder doubles and the temperature in the cylinder reaches 250 °C, at which point the valve is closed. (a) State the assumptions and write and simplify the mass and energy balance equations. (b) Calculate the work done during the process. (c) Determine the mass of steam that has entered. (d) Calculate the amount of heat transfer.
the lifetime of a lightbulb is normally distrbuted with a mean of 1000 hrs and a standard deviation of 30 hours. find the probability that a randomly selected light bulb last longer than 1045 hours.
Calculate the force required in direct extrusion of 1100-O aluminum from a diameter of 6 in. to 2 in. Assume that the redundant work is 30% of the ideal work of deformation, and the friction work is 25% of the total work of deformation.
A glass/epoxy laminate with a fiber orientation of 30 degrees is subjected to a shear stress t_xy (or tau_xy) which can be positive or negative.
Motor coming to rest, A motor is running at 12 rpm and the switch is flipped and cuts the power. The rotor weighs 75 lbs.
KVL provides us with another way of arriving at a complete set of equations. There are three distinct loops in the circuit. Are There Any Tricks That Can Make This Easier?
finite element analysis fea is a modern-day tool in the analysis of structural mechanics fluid dynamics and heat
(a) Find the speed of the bucket (b) How fast must the bucket move at the top of the circle so that the rope does not go slack?
Determine the largest allowable square cross section of a steel shaft of length 6 m if the maximum shearing stress is not to exceed 135 MPa
find the total heat loss per m length of the steam line. Find also the temperature at the interface of steam and insulation.
Determine an expression for the number of cycles to failure, Nf if the initial crack size is a0. State any assumptions you make.
tow forces p and q are applied as shown at a point a of a hook support. knowing that p 75 n and q125 n determine
Estimate the Schmid Factor, which is used to convert the CRSS into a critical tensile 'yield' stress. Use the measured angle between the slip trace and the sample long axis
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