A piece of substance of specific heat capacity 450Jk...
A piece of substance of specific heat capacity 450Jkg−1k1 falls through a vertical distance of 20m from rest. Calculate the rise in temperature of the substance on hitting the ground when all its energies are converted into heat. [g = 10ms−2]
29ºC
49ºC
92ºC
94ºC
Correct answer is B
Using the law of conservation of energy
mc△θ = mgh
△θ = ghc=10×20450=49ºC
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