A piece of substance of specific heat capacity 450Jkg\(^{-1}\)k\(^{1}\) falls through a vertical distance of...
PHYSICS
JAMB 2021
A piece of substance of specific heat capacity 450Jkg\(^{-1}\)k\(^{1}\) 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\(^{-2}\)]
- A. \(\frac{2}{9}\)ºC
- B. \(\frac{4}{9}\)ºC
- C. \(\frac{9}{2}\)ºC
- D. \(\frac{9}{4}\)ºC
Correct Answer: B. \(\frac{4}{9}\)ºC
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Mgh= Mc?
gh=c?
10*20=450*?
?= 200/450
= 4/9