Properties Of Solids And Liquids Question 55

Question: Of two masses of 5 kg each falling from height of 10 m, by which 2kg water is stirred. The rise in temperature of water will be [RPET 1997]

Options:

A) 2.6°C

B) 1.2°C

C) 0.32°C

D) 0.12°C

Show Answer

Answer:

Correct Answer: D

Solution:

W=JQ

therefore (2m)gh=J×mcΔθ

therefore 2×5×10×10=4.2(2×1000×Δθ)

therefore Δθ=0.1190C=0.12C



NCERT Chapter Video Solution

Dual Pane