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Imagine that a site in Iceland is discovered where temperatures a relatively short distance below the surface of the earth are in the range of 600°C (due to the relatively close proximity of molten rock upwelling from deep inside the earth). A geothermal power plant is constructed at this site. The cold reservoir for this plant is a pool of water constantly fed with ice from a glacier. If the plant produces 100 MW of electrical energy, what is the rate at which ice is melted?
A skier has a speed of 5.0 m/s on top of a hill that is 30.0 m above the valley floor. Determine the speed of the skier while she is in the valley floor
Two boxes of masses, m and 2m, are in contact with each other on a frictionless surface. What is the acceleration of the more massive box
You bring a 350-g wrench into the house from your car. The house is 15 C warmer than the car, and it takes 2.52 kJ of energy to warm the wrench by this amount. Find (a) heat capacity of the wrench and (b) specic heat of the metal it's made from.
A highway curve with radius 1000{\rm ft} is to be banked so that a car traveling 48.0{\rm mph} will not skid sideways even in the absence of friction
q1. sunlight enters a room at an angle of 32 above the horizontal and reflects from a small mirror lying flat on the
Electricity and process heat requirements of a manufacturing facility are to be met by a cogeneration plant consisting of a gas turbine and a heat exchanger for steam production.
A physics professor wants to demonstrate the large size of the henry unit. On the outside of a14-cm-diameter plastic hollow tube, How many kilometers of copper wire will be required
Two ice skaters, with masses of 30.0kg and 65.0kg , are at the center of a 60.0m -diameter circular rink. If the heavier skater reaches the edge in 40.0s , how long does the lighter skater take to reach the edge
IP An rms voltage of 12.5V with a frequency of 1.10kHz is applied to a 0.375?F capacitor. Calculate the current for a frequency of 2.20kHz
A 0.07 kg bullet traveling at 569 m/s hits a 5.9 kg block of wood and stays in the wood. What is the velocity (speed)of the wood block
two stationary positive point charges charge 1 of magnitude 3.60 nc and charge 2 of magnitude 1.60 nc are separated by
Two protons, each having a speed of 0.970c in the laboratory, are moving toward each other. Determine the momentum of each proton in the laboratory
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