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A coal-fired plant generates 600MW of electric power. Theplant uses 4.8 X 10^6 kg of coal each day and the heat ofcombustion is 3.3 X 10^7 J/kg. The steam that drives the turbinesis at 300C and the exhaust water is at 37C. What is the Carnot efficiency?
A research submarine has a 20-cm-diameter window that is 8.0cm thick. What is the submarine's maximum safe depth in salt water
Three radio-equipped plumbing vans are broadcasting on the samefrequency f0. Van 1 is moving east of van 2 with thespeed v, What is the frequency of each van as received by theothers
At a constant speed of 55 km/h , an automobile travels 600m along a straight highway that is inclined 5.0 degrees to the horizontal. What is the cars vertical velocity magnitude
The quartz crystal in a digital watch has a frequency of 32.8 kHz. What is its period of oscillation?
A 1.82-cm high object is placed 22.0 cm in front of a concave mirror with a 3.55-cm focal length. What is the position of the image
An Oil droplet with a radius of 0.03 mm is observed to hover motionless in space between two vertically separated metal plates. What is the net charge on the oil drop
An earth satellite of the mass 3500 kg moves in a circular orbit with an orbital speed of 3.3 km/s. Find the elevation of the satellite over the Earth surface
At what angle should the highway engineer bank. What is the magnitude of the acceleration.
A jewelry maker has asked your glass studio to produce a sheet of dichroic glass that will appear red for transmitted light, how thick should the coating be
The emissivity of tungsten is 0.35. A tungsten sphere of radius 1.5 cm is suspended within a large evacuated enclosure whose walls are at 300 K. What power input is required to maintain the sphere at a temperature of 3000 K
A 0.7 kW heater is designed to operate at 210 V. Assume that its resistance is constant. What is the power dissipated in this resistor if it operates at 120 V
Susie Maroney from Australia set a women's record in long-distance swimming by swimming 93.625 km in 24 h. If she had a mass of 55 kg, how much kinetic energy did she have
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