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- The speed of a system of particles increases. Which of the following quantities must also increase? (Select all that are correct.) The heat of the system The thermal energy of the system The temperature of the system(I) How does the number of atoms in a 27.5-gram gold ringcompare to the number in a silver ring of the same mass?(II) Determine the energy content of 100 g of Karen’s fudgecookies from the following measurements. A 10-g sampleof a cookie is allowed to dry before putting it in a bombcalorimeter (page 396). The aluminum bomb has a mass of0.615 kg and is placed in 2.00 kg of water contained in analuminum calorimeter cup of mass 0.524 kg. The initialtemperature of the system is 15.0°C, and its temperatureafter ignition is 36.0°C
- An electrical-generation utility sometimes pumps liquid water into an elevated reservoir during periods of low electrical consumption. This water is used to generate electricity during periods when the demand for electricity exceeds the utility’s ability to produce electricity. Discuss this energy-storage scheme from a conversion efficiency perspective as compared to storing a compressed phasechanging substance.Compare the otto cycle with diesel cycle.A gasoline engine has a power output of 200 kW. (Note that 1 Watt = 1 Joule/s). Its thermal efficiency is 32%. (a) How much heat must be supplied per second? (b) How much heat is discarded by the engine per second?
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