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A fossil-fuel steam power plant operates at about 50% of Carnot thermal efficiency. It has been suggested that the air pollution from a plant that operates at 1000 F would contribute 1/2 the pollution (per ton of coal burned) that the present system that operates at about 1500 F. The heat rejection temperature is 70 F. For the same electrical output what is the percent difference in the pollution resulting from the combustion?
how long is required for half the ice cube to melt? State clearly all the assumptions you make in formulating your model of this problem.
What is the total rate of heat transfer to the air? What is the pressure drop associated with the airflow?
What is the inner tube surface temperature at the outlet, where fully developed conditions may be assumed?
An air conditioner in the airport of Timbuktu runs a cooling system using R-410a with a high pressure of 1500 kPa and a low pressure of 200 kPa. It should cool the desert air at 45 degrees C down to 15 degrees C. Find the cycle COP. Will the syste..
Use the bisection method to determine the drag coefficient (cd) needed so that a 80 kg bunjee jumper has a velocity of 36 m/s after 4 s of free fall.
consider the following pulse width modulation rc circuit. the circuit consists of a switch two resistors and a
for flow over a circular cylinder as shown below the velocity outside of boundary layer can be estimated to beux 2 ug
the transverse shear v at a certain section of timber beam is 25kn. if the beam has the cross sectio shown in the
Newtons laws describing equations of motion for balance beam with cart (ball), Need to obtain a working mathematical model of the balance beam problem, preferably with a cart, not a ball
a composite aluminium alloy e 72gpa and v 0.33 cylinder is made up of an inner cylinder with inner and outer
sludge is wet solids that result from the processing in municipal sewage systems. the sludge has to be dried before it
If the trap door's weight is 50N. Calculate the tension in the string and the reaction at the hinge.
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