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A steam power plant has, at the turbine entrance, saturated vapor with a pressure of 40 bar. The turbine exit is at 50 degrees C. The pump entrance is at 50 degrees C as well, and its exit is saturated liquid at 40 bar. The pump and turbine are isentropic. a) What is its thermal efficiency? b) At what rate is energy being given off by heat transfer to the cold thermal reservoir?
A wave with a frequency of 200Hz is traveling down a 100m long wire whose total mass if 15 kg. The wire is under a tension of 1000 N. What is the length of the wave?
A small hollow tube is glued to a speaker in a vertical manner. The speaker is set to play a single tone such that it vibrates vertically with simple harmonic motion. Find an expression for the frequency at which rattling begins
What is EMF in the secondary circuit
A long wire is known to have a radius greater than 5.2 mm and to carry a current that is uniformly distributed over its cross section, What is the radius (in mm) of the wire
A quantity of carbon monoxide gas is slowly compressed adiabatically in an insulated container to one-half of its volume. determine the final pressure of the gas
A ruler of mass m = 75g and L=3.0meters is placed so that it is exactly balanced across two spinning cylinders a distance d = 1.0meters apart. What is the frequency of oscillation in the ruler
Although an ideal voltmeter has an infinite internal resistance, this theoretical ideal is usually not met in practice. The voltmeter has an internal resistance of 8 x 10^9 Ohms and is used to measure the voltage across the resistor R2.
A 1.40 kg iron horseshoe is taken from a forge at 950°C and dropped into 4.00 kg of water at 14.0°C. Assuming that no energy is lost by heat to the surroundings, determine the total entropy change of the horseshoe-plus-water system.
A solid sphere with a radius of 9.3 cm an mass of 373 g is allowed to roll 4.30 m without slipping down a 13.2 degree incline. What is the moment of inertia of the sphere
A Camper dives from the edge of a swimming pool at water level with a speed of 8.0m/s at an angle of 30.0 degrees above the horizontal. How far out in the pool (range) does the diver land
A baseball is bunted down the third-base line leaving the bat from a height of 0.850m with an initial velocity of 4.00m/s at an angle of 36.87° above horizontal, what is the baseball's tangential acceleration at maximum height
a room measures 50x3020. the dilution volume flow rate is 3000 cfm. at 800 am the concentration of a contaminant is 50
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