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JEE MAIN 2019
09-04-2019 S2
Question
A massless spring (k = 800 N/m), attached with a mass (500 g) is completely immersed in 1 kg of water. The spring is stretched by 2 cm and released so that it starts vibrating. What would be the order of magnitude of the change in the temperature of water when the vibrations stop completely? (Assume that the water container and spring receive negligible heat and specific heat of mass = 400 J/kg K, specific heat of water = 4184 J/kg K)
Select the correct option:
A
$10^{-5} \mathrm{~K}$
B
$10^{-1} \mathrm{~K}$
C
$10^{-3} \mathrm{~K}$
D
$10^{-4} \mathrm{~K}$
✓ Correct! Well done.
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