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A steam power plant operates on the reheat Rankine cycle. Steam enters the highpressure turbine at 12.5 MPa and 550°C at a rate of 7.7 kg/s and leaves at 2 MPa. Steam is then reheated at constant pressure to 450°C before it expands in the low-pressure turbine. The isentropic efficiencies of the turbine and the pump are 85 percent and 90 percent, respectively. Steam leaves the condenser as a saturated liquid. If the moisture content of the steam at the exit of the turbine is not to exceed 5 percent, determine: (a) the condenser pressure, (b) the net power output, and (c) the thermal efficiency.
A rectangular air mattress is 1.7 mlong, 0.55 m wide, and 0.05 m thick. If it has a mass of 2.0 kg, what additional mass can it support in water
A ball is thrown upward from the top of a building at an angle of 60.0° to the horizontal, What is the horizontal distance (in m) covered by ball before hitting the ground
A physicist is designing a cyclotron to accelerate protons toone tenth the speed of light. The magnet used will produce a fieldof 1.4 T. Calculate the radius of the cyclotron
What is the safe operating voltage for a 100 Ohm, 1/10W resistor? The maximum current? How much power is dissipated at half the maximum voltage
Assume that you wish to fabricate a uniform wire out of0.800 g of copper. If the wire is to have a resistance R = 0.400 , and if all of the copper is to be used. What will be the length of the wire? What will be the diameter of the wire?
A 50 kg box is resting on an inclined surface of 32 degrees. The coefficient of friction between the box and the surface is 0.45. Draw a force diagram and express the equations for all the x and y forces.
A 35-kg child rides a playground merry-go-round, standing 1.6 m from its center. What was the distance travelled by the child during this time
CA particle with a charge of = -5.40 is moving in a uniform magnetic field of -1.21. The magnetic force on the particle is measured to be ?7.60×10?7. calculate the x component of the velocity of the particle
An ideal gas occupies a volume of 1.8 cm3 at 20°C and atmospheric pressure. Determine the number of molecules of gas in the container
calculate the magnitude of the force if Q1 is 4 x 10^-9 coulombs and Q2 is 8 x 10^-12 coulombs and the distance between them is 3 x 10^-8 meters.
Suppose that gravatational mass and inertial mass aredifferent but they are proportional to one another. Determine the acceleration of a freely falling object near thesurface of the Earth
a battleship simultaneously fires two shells toward two identical enemy ships. one shell hits ship a which is close by
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