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How would the wheel diameter and the volumes of the containers holding the working substance affect performance? Are there any practical applications for such a device? Discuss?
Plot a curve of the specific exergy of 1 kg of a substance that has a constant specific heat of 1 kJ/kg-K over the temperature range -100°C to +1000°C
Compute the entropy production and the exergy (work) loss due to the exchange of heat across a finite temperature difference. The heat exchanger shell is perfectly insulated.
The inlet area od the nozzle is 50 cm squared and the heat is being lost at a ate of 90KJ/s. Determine the mass flow rate of the system.
Assuming that each atom of the substitute is equally effective as V atom, what weight percent of the substitute would you recommend to replace 0.05 wt %?
Heat transfer from the cycle is qout = 100 kJ/kg. Assume the temperature independent properties for air. What is the value of the inlet pressure to the turbine?
An ideal air-standard closed Brayton cycle operates between the pressures of 1 atm and P2. What is the value of the inlet pressure to the turbine?
Calculate the maximum pressure that the walls must withstand. Also find the cycle efficiency. Assume temperature independant properties for air. For ideal gas, Pv/T = constant.
Determine ( a) the time required for the train to travel the first 2.5 mi, ( b) the speed of the train as it arrives at the station, ( c) the final constant deceleration of the train.
Assuming that the force exerted by the pitcher on the ball acts over a distance of two arm lengths, each 28 inches (for a total of 4.67 ft), estimate the average force exerted by the pitcher on the
Knowing that E= (29 x 10^6) psi and Poissons Ratio = .30, determine the initial force in the bolt, if the diameter is observed to decrease by (0.5 x 10^-3) in.
Knowing that Paisson's ratio = 0.3 and E = 200 GPa, determine (a) the elongation of the rod in a 200-mm gage length (b) the change in diameter of the rod.
This causes an expansion, which happens adiabatically and isothermally. How much does the volume increase (in cubic centimeters)?
Determine the power required for a 2500 kg car to climb a 60 m long uphill road with a slope of 15º (from the horizontal) in 5 seconds, at Constant velocity.
How would you define a system to determine the temperature rise created in a lake when a portion of its water is used to cool a nearby nuclear power station?
Saturated-vapor steam at 2 Psia enters a condenser and leaves as saturated-liquid at the same pressure. Calculate the heat loss from the steam.
At that instant, the sing was moving up at a constant rate of (pi/8) rad/s. Express using orthogonal unit vectors.
Assuming that all the heat supplied to the extracted bitumen part is recovered at the wellhead, how much heat must be supplied to the sand-stone for this process?
Assuming that the natural gas may be approximated as pure methane, which has physical properties as listed below, determine the mass (kg) of natural gas contained within the storage tank.
In a mild steel block, a flat surface of length 100 mm and width 60 mm has to be finished in a shaping machine in a single pass.
Derive the model equation, mass and temperature for a PFR reactor with a first order reaction A= product.
Derive the model equation, mass and temperature for a CSTR reactor with a first order reqaction A= product. Assume: constant temperature and density.
Calculate the rates of exergy destruction in the compressor and turbine, respectively, each in kW, for T0 5 300K.
Determine the volume of gas in the tank. Also plot pressure versus v and T for the isotherms T = 250, 500 and 1000 K.
The surface temperature of the wall exposed to air is measured and found to be 50 C. Do steady- state conditions exist? If not, is the tempera-ture of the wall increasing or decreasing with time?