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A piston cylinder device contains 1 kg water at 20oC with a volume of 0.01 m3 by mistake someone locks the piston preventing it from moving while we heat the water to saturated vapor.
Repeat the treatment in e) but this time hold only for 50s at 400°C, then rapidly heat to 600°C, hold for 5s and then quench in water. What phases will you have now?
Measurements show that the final volume is double the initial and the final pressure is 25% of the initial. Assuming that air behaves as an ideal gas, determine the final temperature in K and the h
A 80 kg resting person with a constant core temperature near 37 C transfers heat at the resting rate to his/her surroundings, which is at a temperature of 22 C.
Determine the change in the rate at which the following quantities enter and exit the tube: (a) the combined thermal and flow work, (b) the mechanical energy, and (c) the total energy of the water.
A steel pipe of 12-in. outer diameter is fabricated from 1/4in. thick plate by welding along a helix which forms an angle of 22.5 degrees with a plane perpendicular to the axis of the pipe.
What is the minimum required length of the rod so that one end of the rod can be twisted 30 degrees with respect to the other end without exceeding the allowable stress?
An automotive repair shop stock many sizes of tires. One particular size and model is purchased for $15 and sold for 30. The manager estimates the cost to order at $75m, including the delivery charg
A turbine accepts superheated steam at 800 psia and 1200°F and rejects it as saturated vapor at 2 psia. Calculate the velocity at the exit and predict the horsepower output of the turbine if the
The power output of a steam turbine is 30 MW. Determine the rate of steam flow in the turbine for saturated steam entering at 0.1 MPa. The outlet pressure is 10 kPa and the expansion is reversible
A block having a mass of 0.8 kg is suspended from a spring having a stiffness of 120 N/m. If the dashpot provides a damping force of 2.5 N when the speed of the block is 0.2 m/s, determine the peri
Determine the magnitude of the force FA the boy at A must exert in order to prevent the gate from turning. Neglect the thickness of the gate.
If the isentropic efficiency of the compressor is 80 % determine the actual and ideal work input to the compressor in kj/kg,show the inlet state and the ideal and actual exit states on a T-s diagram
At the beginning of the compression process in an ideal Otto cycle air is at 95 KPa ,27 degree c ,and the temperature at the end of the compression process is 416 degree c .1600 kJ/kg of heat is tra
The nominal composition by weight of this material is as follows: carbon 0.08 percent; chromium 19 percent; nickel 10 percent; iron the remainder. Calculate the macroscopic absorption cross sectio
Calculate and plot the response of a system with transfer function G(s)=100(s^2+2)/(s^3+s^2+5s+1) to the input, u(t)=10exp(-t)sin(5t), assuming zero initial conditions.
The third law entropy for gas at STP is 270 J/K/mole. Calculate delta U and delta G for the process and also the initial state of the gas.
A gas turbine has a three-stage compression with inter-cooling and a three-stage expansion with re-heating. Air enters the compressors at 300Kand100kPa.
A tank of propane has capacity of 120 gallons, what would the tank be rated in terms of cubic feet, cubic meters and liters? If the pressure gage shows a reading of 45psig.
A flat-bottomed barge, 25 m long and 10 m wide, submerged to a depth of 1.5 m, is to be pushed up a river at a rate of 8.6 km/hr. Calculate the power needed to overcome skin friction (in kW) if the
What is the optimal number of cases to have on hand to minimize expected total costs in a single week? show calculations. What is the expected cost?
An elevator, having a weight of 500 lb, needs to be lifted a distance y = 20ft, starting from rest and then stopping after at t=6 sec. A single motor and cable-winding can be mounted anywhere and us
Air expands in a piston-cylinder device with a polytropic exponent of 1.3. The initial pressure and temperature were 630 KPa and 550oC respectively. The final pressure is 100 kPa. Find the specific
Determine the amount of energy transfer by work from the steam to the piston during the process, in KJ. Also determine the initial and final quality and the enthalpy change.
An engineer designing a vibration isolation system for an instrument console models the console and isolation system as a 1 degree-of-freedom spring-mass-damper system.