physics question related to thermodynamic!!?
2018-03-11 3:18 pm
An ice cube with a mass of 0.567 kg and a temperature of 0.0 °C slides to a stop across a level floor from an initial speed of 4.5 m/s. Assuming all mechanical energy lost is converted in to internal energy of the ice cube, what is the change in internal energy of the cube?
回答 (1)
2018-03-12 12:09 pm
Kinetic energy of the moving ice cube:
0.5mv2 = 0.5x0.567x4.5x4.5 (change in v = from 4.5m/s-0m/s) = 5.740875J
0.5mv2 = 0.5x0.567x4.5x4.5 (change in v = from 4.5m/s-0m/s) = 5.740875J
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