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Unformatted text preview: 1000 W/m 2 = 0.3 SP7: The energy required by animals to sustain life is derived from oxidation of ingested food. It is in essence burned in the body. A food sample is placed into a bomb type calorimeter with oxygen to measure the energy content of the food (see Fig. 2.16 in the text). Surrounding the vessel of food and oxygen is a water bath. The igniter ignites the food and oxygen mixture. This releases energy that heats the water, causing its temperature to rise. The power input to a stirrer used to circulate the water is 0.04 kW. In a 20-minute period the heat transfer from the bomb is 1200 kJ and the heat transfer from the water tank to the surrounding air is 60 kJ. Assuming no evaporation of water, determine the increase in the internal energy of the water....
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- Spring '08