In order to keep a basement from flooding, it is necessary to pump 285 kg of water each minute from the basement up to a height of 3.28 m (and then outside). If 18.6% of the total energy used by the pump is wasted as heat, what is the minimum wattage pump that is required to keep the basement from fl

In order to keep a basement from flooding, it is necessary to pump 285 kg of water each minute from the basement up to a height of 3.28 m (and then outside). If 18.6% of the total energy used by the pump is wasted as heat, what is the minimum wattage pump that is required to keep the basement from fl

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter7: Conservation Of Energy

Section: Chapter Questions

Problem 32P: Sewage at a certain pumping station is raised vertically by 5.49 m at the rate of 1 890 000 liters...

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As a gasoline engine is running, an amount of gasoline containing 13,600 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,400 J of work. (a) What is the engine's efficiency (in percent)? % (b) The burning gasoline has a temperature of about 4,100°F (2,500 K). The waste heat from the engine flows into air at about 90°F (305 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures? Need Help? % Read It
As a gasoline engine is running, an amount of gasoline containing 11,700 J of chemical potential energy is burned in 1 s. During that second, the engine does 3,900 J of work. (a) What is the engine's efficiency (in percent)? % (b) The burning gasoline has a temperature of about 4,700°F (2,900 K). The waste heat from the engine flows into air at about 82°F (301 K). What is the Carnot efficiency (in percent) of a heat engine operating between these two temperatures?
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