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1. Steam enters the turbine of a Rankine cycle power plant at 12.0 MPa and 400.°C. How much does the isentropic thermal efficiency increase if the condenser pressure is lowered from 0.100 to 1.00 × 10-3 MPa?
2. Steam enters the turbine of a Rankine cycle power plant at 200. psia and 500.°F. How much does the isentropic thermal efficiency increase if the condenser pressure is lowered from 14.7 to 1.00 psia?
A 1.02 liter flask contains a certain quantity of ideal gas at 315 K. Then an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.60 times its original value. What is a final temperature.
A satellite is placed in a circular orbit about Earth with aradius equal to 51% the radius of the Moon's orbit. What is its period of revolution in lunar months
A screen is placed 1.30 {rm m} behind a single slit. The central maximum in the resulting diffraction pattern on the screen is 1.70 {rm cm} wide-that is, two first-order diffraction minima are separated by 1.70 {rm cm}.
A 29 kg board 3.2 m long is supported in a horizontal position at the two ends. A 77 kg worker stands 1.4 m from one end. What forces are exerted by the board on the two support points
A 2.05 kg mass is attached to a light cord that is wrapped around a pulley of radius 4.65 cm, which turns with negligible friction. Find the moment of inertia of the pulley
A 48.0 ice skater spins about a vertical axis through her body with her arms horizontally outstretched, making 2.50 turns each second. The distance from one hand to the other is 1.50. Biometric measurements indicate that each hand typically makes ..
A glass coffee pot has a circular bottom with a 9.00cm diamteter in contact with a heating element that keeps the coffee warm with a continous heat transfer rate of 50.0w, what is the temperature of the bottom of the pot, if it is 3.00mm thick and..
A mass m = 7.5 kg hangs on the end of a mass less rope L = 1.81 m long. The pendulum is held horizontal and released from rest. How fast is the mass moving at the bottom of its path
If you charge a capacitor C1 with a battery V, then disconnect the capacitor and use it to charge 3 capacitors C2-4 connected in series, what is the potential difference across each of the four capacitors?
An automobile is traveling directly west for 16 kilometer west at 90km/h, then it travels directly south for 8 kilometer at 80km/h, Find what is the change in velocity for those trip
A 6.50*10^4 kg space probe is traveling at a speed of 10000 m/s through deep space. What is the final speed of the probe
A 20 g block of aluminum is at 370 degrees C after 1,130calories have been transferred to it. What was the original temperature
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