Two ways to change the energy of a system; First law of thermodynamics; Specific heat
Impact of extinction-causing meteorite Scientists have proposed that 65 million years ago in what is now the Yucatan peninsula of Mexico, a 1.2 X 1016-kg meteorite moving at speed 11 km/s collided with Earth, and the resulting harsh conditions led to the extinction of many species, including the dinosaurs. (a) Calculate the kinetic energy of the meteorite before the collision. (b) If 20% of this energy was converted to thermal energy in the meteorite, which had a specific heat of 900 J/kg . °C, by how much did its temperature increase?
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