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A typical coal from the Montana coalfields might contain 70% carbon and 1.5% sulfur. For each pound burned in a fossil-fuel electric power plant, this coal produces 10,000 Btu of heat, 0.03 pound of sulfur oxides, and 1.2 pounds of ash. Assuming the plant boiler, turbine, and electric generator have energy conversion efficiencies of 88%, 47%, and 99%, respectively, what is the electric energy output (in kWh) for every 1000 pounds of coal burned.
There is no difference between the static charges generated by rubbing rods with fur or silk and the charges that flow(from battery) through wires in an electric circuit. Why there is no difference?
0.97 L of 16C water is placed in a refrigerator. What is the refrigerator's coefficient of performance
A grinding wheel is a uniform cylinder with a radius of 8.5 cm and a mass of .580 kg. Calculate its moment of inertia about its center
A sound wave from a siren has an intensity of 88.8 W/m2 at a certain point, What is the intensity level of the sound wave due to the ambulance
question a child throws a ball downward from a tall building. note that the ball is thrown not dropped and disregard
question a 10-cm-long thin glass rod is uniformly charged to 50 nc. a small plastic bead charged to - 5.4nc is 4.5 cm
A playground merry-go-round has a disk-shaped platform thatrotates with negligible friction about a vertical axis. how fast will the disk be turning
1 a ball is dropped from the top of a building. after 2 seconds its velocity is measured to be 19.6 ms. calculate the
The triangular loop of wire in the drawing carries a current of I= 6.91 A. A uniform magnetic field is directed parallel to the side AB of the triangle and has a magnitude of 2.77 T.
A nylon rope used by mountaineers elongates 1.30m under the weight of a 65.5kg climber. what is Young's modulus for this nylon
assume you are carrying out the conversion of 1-bromobutane to 1-butane. how could you use infrared spectroscopy ir to
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), what is the angle of refraction for each wavelength
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