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1. Steam enters the turbine of a Rankine cycle power plant at 200. psia and 500.°F. How much will the isentropic Rankine cycle thermal efficiency increase if the condenser pressure is lowered from 14.7 psia to 1.00 psia? Neglect the pump work.
2. A small portable nuclear-powered Rankine cycle steam power plant has a turbine inlet state of 200. psia, 600.°F, and a condenser temperature of 80.0°F. The steam mass flow rate is 0.500 lbm/s. Assuming that the condenser exit state is a saturated liquid, that the pump and turbine isentropic efficiencies are 55.0% and 75.0%, respectively, and that there are no pressure losses across the boiler or condenser, determine
a. The actual power required to drive the pump.
b. The actual power output of the plant.
c. The actual thermal efficiency of the plant.
A bus contains a 1440 kg flywheel ( a disk that has a 0.670 m radius ) and has a total mass of 9400 kg. Calculate the angular velocity of the flywheel
A Two balloons of identical volume (radius 11.5 m) are filled with gas. The first with helium, the second with hydrogen (H2) gas. What is the lift created by each one
After the skier on the hill had been moving for 5.0 s, friction of the snow suddenly increasedmaking the net force on the skier zero. what is new coefficient of friction? how fast would the skier now be going after skiing for 5.0s.
The rms current through a light bulb is 0.947 A when the bulb is connected to a standard120 V rms source. Find the bulb's resistance. Find the peak instantaneous.
An asteroid of mass 2.3×10^5kg , traveling at a speed of 21km/s relative to the Earth, hits the Earth at the equator tangentially, estimate the percent change in the angular speed of the Earth
A car is traveling along a straight road at a velocity of +35.2 m/s when its engine cuts out. Find the velocity of the car at the end of the initial 1.71-second interval
You have a set of converging lenses with focal lengths 2.00 cm, 12.0 cm, 58.5 cm, and 77.5cm. What is the angular magnification of the telescope
A 5.60kg block located on a horizontal floor is pulled by a cord that exerts a force F = 11.5 N at an angle theta = 28.5o above the horizontal, as shown in the Figure. The coefficient of kinetic friction between the block and the floor is 0.08. Wha..
An electron is suspended in a vacuum between two oppo- sitely charged horizontal parallel plates. What is the voltage across the plates
A proton moving with a velocity 3×105 ms-1 enters a magnetic field of 0.3 T, at an angle of 30? with the field. What will the radius of curvature of its path be (e/m for proton ˜ 108 C kg-1 )?
A potential difference of 1.50 V will be applied to a 40.0 m length of 18-gauge copper wire (diameter 0.04 in.), find the rate at which thermal energy will appear in the wire
q1. a 2.47 kg steel ball strikes a massive wall at 11.7 ms at an angle of alpha 67.2deg with the plane of the wall. it
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