Approximately 2.1 x 105 kg of water falls 14 m over a waterfall each second. (a)...
Approximately 2.1 x 105 kg of water falls 14 m over a waterfall each second. (a) What is the decrease in the gravitational potential energy of the water-Earth system each second? (b) If all this energy could be converted to electrical energy (it cannot be), at what rate would electrical energy be supplied? (The mass of 1 m3 of water is 1000 kg.) (c) If the electrical energy were sold at 1.7 cent/kW·h, what would be the yearly income in dollars
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Approximately 2.1 x 105 kg of water falls 14 m over a waterfall
each second. (a)...
Approximately 1.0 x 106 kg of water falls 45 m over a waterfall each second. (a) What is the decrease in the gravitation...
Approximately 1.0 x 106 kg of water falls 45 m over a waterfall each second. (a) What is the decrease in the gravitational potential energy of the water-Earth system each second? (b) If all this energy could be converted to electrical energy (it cannot be), at what rate would electrical energy be supplied? (The mass of 1 m3 of water is 1000 kg.) (c) If the electrical energy were sold at 3.3 cent/kW·h, what would be the yearly income in...
A hydroelectric generator converts kinetic energy of water into electrical energy. Each second 2915 m3 of...
A hydroelectric generator converts kinetic energy of water into electrical energy. Each second 2915 m3 of water passes over a waterfall 300 m high and the generator is only 84% efficient: (The mass of 1 m3 of water is 1000 kg.) a) What is the total energy available? b) What is the power generated? W
A dam collects water at a height of 300m. The water can be let down through a pipe. As it falls t...
A dam collects water at a height of 300m. The water can be let down through a pipe. As it falls to the ground it loses potential energy but it gains kinetic energy. 100 tonnes (note 1 tonne 1000 kg) of water are let out from the dam and reach the ground, 300m below; all the gained kinetic energy is then harnessed by a perfectly efficient turbine and converted into energy to power houses in the valley. The Bureau of...
25. In a hydroelectric dam, water falls 25 m and then spins a turbine to generate...
25. In a hydroelectric dam, water falls 25 m and then spins a turbine to generate electricity. a) What is U, of 1.0 kg of water? b) Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through the turbines each second to generate 50 MW of electricity? This is a typical value for a small hydroelectric dam.
1.There are approximately 105 million households that use TVs in the United States. Each TV uses,...
1.There are approximately 105 million households that use TVs in the United States. Each TV uses, on average, 75 W of power and is turned on for 6.0 hours a day. If electrical energy costs $0.09 per KWh, how much money is spent every day in keeping 105 million TVs turned on? 2.The rear window of a van is coated with a layer of ice at 0°C. The density of ice is 917 kg/m3. The driver of the van turns...
A 0.375 kg stone is held 1.42 m above the top edge of a water well...
A 0.375 kg stone is held 1.42 m above the top edge of a water well and then dropped into it. The well has a depth of 4.78 m. Take y = 0 at the top edge of the well. a) What is the gravitational potential energy of the stone-Earth system before the stone is released? b) What is the gravitational potential energy of the stone-Earth system when the stone reaches the bottom of the well. c) What is the...
Two red blood cells each have a mass of 9.05 x 10-14 kg and carry a...
Two red blood cells each have a mass of 9.05 x 10-14 kg and carry a negative charge spread uniformly over their surfaces The repulsion arising from the excess charge prevents the cells from clumping together. One cell carries -2.10 pC and the other 2.60 pc, and each cell can be modeled as a sphere 3.75 × 10-6 m in radius. If the red blood cells start very far apart and move directly toward each other with the same speed,...
A. 2 pts. Consider a small hydroelectric power station that generates 1000 kW of electrical power....
A. 2 pts. Consider a small hydroelectric power station that generates 1000 kW of electrical power. Water passes through the turbine as it falls from the reservoir level down a vertical drop of 25.0 m to the river below the dam. Assuming 80.0% conversion efficiency, what volume of water must pass through the turbine each second? (give answer in m') p= density of water 1000 kg/m3 g=9.81 ms-2 B. 2 pts. Determine the total energy content of all the natural...
A hydroelectric generator converts kinetic energy of water into electrical energy. Each second 2915 m3 of water passes over a waterfall 300 m high and the generator is only 84% efficient: (The mass of 1 m3 of water is 1000 kg.) a) What is the total energy available? b) What is the power generated? W
A dam collects water at a height of 300m. The water can be let down through a pipe. As it falls to the ground it loses potential energy but it gains kinetic energy. 100 tonnes (note 1 tonne 1000 kg) of water are let out from the dam and reach the ground, 300m below; all the gained kinetic energy is then harnessed by a perfectly efficient turbine and converted into energy to power houses in the valley. The Bureau of...
25. In a hydroelectric dam, water falls 25 m and then spins a turbine to generate electricity. a) What is U, of 1.0 kg of water? b) Suppose the dam is 80% efficient at converting the water's potential energy to electrical energy. How many kilograms of water must pass through the turbines each second to generate 50 MW of electricity? This is a typical value for a small hydroelectric dam.
Two red blood cells each have a mass of 9.05 x 10-14 kg and carry a negative charge spread uniformly over their surfaces The repulsion arising from the excess charge prevents the cells from clumping together. One cell carries -2.10 pC and the other 2.60 pc, and each cell can be modeled as a sphere 3.75 × 10-6 m in radius. If the red blood cells start very far apart and move directly toward each other with the same speed,...
A. 2 pts. Consider a small hydroelectric power station that generates 1000 kW of electrical power. Water passes through the turbine as it falls from the reservoir level down a vertical drop of 25.0 m to the river below the dam. Assuming 80.0% conversion efficiency, what volume of water must pass through the turbine each second? (give answer in m') p= density of water 1000 kg/m3 g=9.81 ms-2 B. 2 pts. Determine the total energy content of all the natural...
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