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A 50 kg man is running at a speed of 18 ...

A `50 kg` man is running at a speed of `18 kmH^(-1)` If all the kinetic energy of the man be uses to increase the temperature of water from `30^(@)C`.How much water can be heated with this energy?

A

5 g

B

10 g

C

15 g

D

20 g

Text Solution

Verified by Experts

The correct Answer is:
C
`1/2 mv^(2)=m' s Delta theta`
`1/2 xx50xx (18xx5/18)^(2)=m'xx4200xx(30-20)`
`m' cong 15 g`
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