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At a coal burning power plant a steam turbine is operated with a power output of 475 MW. The thermal efficiency of the power plant is 27.6 percent. Find at what rate is heat discarded to the environment by this power plant?
A block of mass .250 kg traveling at (1.0 m/s)y hits a second block with a .375 kg mass travelling at (1.2m/s)x, What is the velocity of the 1st blcok after they hit each other
A spring has a radius of 2.6 cm and an inductance of 75 μH when extended to a length of 0.9 m. Find an approximate value for the total number of turns in the spring. The permeability of free space is 1.25664 × 10−6 N/A^2.
A 300 lb bungee jumper wants to jump from the top of a 230 ft high bridge and be able to just touch the water below. what should the bungee cord's relaxed length, l, be for this jump
A football is kicked at an angle of 28.4 degrees above horizontal and with an initial speed of 27.9. The ball lands on a level field. Determine The range of the football
The angular momentum of Earth is constant
A 35 mm camera with interchangeable lenses is used to take a picture of a hawk that has a wing span of 1.5 m. The hawk is 39 m away. What would be the ideal focal length of the lens used
Two identical 13.0- balls, each 22.9 in diameter, are suspended by two 35.0- wires, How hard does each ball push on the other one
a dynamite blast at a quarry launches a rock straight upward and 2.3 s later it is rising at a rate of 14 ms. assuming
A rms AC voltage of 118 V at 60 Hz is applied to an RLC circuit with 11.8 mH inductor, 0.171 µF capacitor, and 43.1 ? resistor in series. What is the power consumed in the circuit
an ideal gas of molar mass m is located in a uniform gravitational field whose free fall acceleration is g. a find the
A 151 kg rocket moving radially outward from Earth has a speed of 5.03 km/s when its engine shuts off 226 km above Earth's surface. (a) Assume negligible air drag; find the rocket's kinetic energy when the rocket is 535 km above Earth's surface. (b) ..
four particles are positioned at the corners of a square that is 4.0 m on each side. one corner of the square is at the
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