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The electric output of a power plant is 730MW . Cooling water flows through the power plant at the rate 1.30 ×108L/hr. The cooling water enters the plant at 13.0?C and exits at 29.0?C .
A. What is the power plant's thermal efficiency?
An object is placed 17.4 cm to the left of a thin diverging lens that has focal length ?11.7 cm. What is the distance between the object and the image
Consider a spacecraft in an elliptical orbit around the earth. At the low point, or perigee, of its orbit, it is 300km above the earth's surface; at the high point, or apogee, it is 2500km above the earth's surface. What if the rockets were fired ..
The battery of a pocket calculator has a voltage of 4.0 V and devilers a current of 0.17 mA, How much energy does the battery deliver to the calculator circuit
A parallel-plate capacitor is charged to an electric potential of 337 V by moving 3.95×1016 electrons from one plate to the other. How much work is done in charging the capacitor.
On a 7.2 m length of string, you count 5 crests and 4 troughs. What is the wavelength of the waves on the string
A 64 Ω resistor is connected in parallel with a 115 Ω resistor. This parallel group is connected in series with a 20 Ω resistor. The total combination is connected across a 15V battery.(a) Find the current in the 115 Ω resistor.(b) Find the power ..
A 6.00 g bullet is fired horizontally at two blocks resting on a smooth tabletop, as shown in the top figure, find the speed of the bullet immediately after it emerges from the first block, find the bullet's original speed
A silicon sample is doped with phosphorus at 1.17 parts per 1.00*10^6, Calculate the number of free (conduction) electrons per unit volume of the doped silicon in conduction electrons per cm^3
Two 2.0cm x 2.0cm plates that form a parallel-plate capacitor are charged to (+/-) 0.708 nC.what are the electric field strength inside and the potential difference across the capacitor if the spacing between plates.
Throughout three hours one winter afternoon, when outside temperature was 9° C, a house heated by electricity was kept at 21° C with the expenditure of 46kwh (kilowatt•hours) of electric energy.
A bug of mass 1.0 grams is caught up in the center of an oscillating spider web. show that this motion is generated by hooke's law force, f=-kx
A 200 weather rocket is loaded with 100 kg of fuel and fired straight up. It accelerates upward at 30 m/s^2 for 33 s, then runs out of fuel. Ignore any air resistance effects. Illustrate what is the rocket's maximum altitude?
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