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Estimate the temperature of the exit gas and the rate at which work is done on the gas (i.e the power requirement) for a gas flow of 3.0mol/s.
Calculate the temperature of the gas in the tank when the pressure has reached 10.34 bar and if the valve does not function properly and the pressure in the tank reaches 69 bar.
Develop equations which may be solved to give the final temperature of the gas remaining in a tank after the tank has been bled from an initial pressure PI to a final pressure P2.
Determine the air temperature at the limiting pressure, Assuming specific heat varies determine the change in internal energy during the process.
Determine the temp. of air at limting pressure? Calculate the heat transfer to the system using both the variable specific heat and the constant specific heat data.
Using ideal gas model and considering the specific heat variation with temperature, determine the turbine isentropic (adiabatic) efficiency.
The respective mass fraction (y's) for each of the feedwater heaters. Find the thermal efficiency of the cycle solving explicitly for all the works and Q's along the way.
How should the rope be cut to maximise the total area enclosed by the pieces? And how should it be cut in order to minimise the total area enclosed by the two pieces?
Determine the exergy destruction per unit mass of steam flowing through the turbine. Neglect the change in potential energy and let T0 = 25 °C P0 = 1.014 bar.
Determine the relative solidification times for each geometry. Based on the results of part (a), which geometric element would make the best riser?
If solving for the total solidification time in the previouse problem and using an exponet value of 1.9 in Chvorinov's rule instead of 2.0, what adjustment must be made in the units of the mold cons
The pressure is 5 lbf/in2, and the fluid velocity is 1100 ft/s. Determine the rate of heat transfer (Btu/s) between the nozzle and the surroundings.
At what temperature, the end of the bar will be in contact with the frame? When temperature of the bar rises to 900C, is there any stress developed in the bar? If yes, what is its magnitude?
Assume that all electrical energy consumed by a household is generated by burning fossil fuels. Calculate the household's related annual CO2 emissions if its average daily usage of electrical energy i
Suppose no heat is lost to the environment in this process, what will be the final temperature of the water after the quenching process?
Find (a) the volume flow rate of water in the jet sheet and (b) the y component of force required to hold the nozzle in place.
A fallen tree trunk is damming up water in a creek. The tree trunk is approximately a cylinder, 40 cm diameter and 4.0 m long. What is the total force of the water on the tree trunk?
The frictional losses in the pipeline are two times the velocity head in the pipeline. The flow in the pipeline is turbulent. What is the pressure in the pipeline?
Determine the inertia force required to move the piston at 6,000 rpm and the required valve spring force when operating at 6,000 rpm.
Estimate the temperature at which the top land (very top of the piston) would be touching the liner that is kept at a constant 100 degrees Celsius by a coolant.
Cooling air at 25oC flows through the fin array with a heat transfer coefficient of 28 W/m2K. Calculate the temperature of the base of the semiconductor. Use k = 175 W/m-K for the aluminum.
At the inlet, the velocity is 40 ft/s and the pressure 15 psia. At the exit, determine the mass flow rate, in lbm/s, and the velocity, in fps.
At some point, the valve between the tanks is opened and the water in the two tanks mix adiabatically. Determine the final state and phase of the mixture after it reaches equilibrium.
What is the mass of the wasted water in lbm? Assume that there are 46,000 drops per gallon and that the density of water is 62.5 lbm/ft3.
Determine (a) the magnitudes of the velocity and acceleration at any instant, (b) the radius of curvature of the path. For (b): Use n-t components of the acceleration.