In a water-fall the water falls from a height of 100 m . If the entire K.E. of water is converted into heat, the rise in temperature of water will be

Options

A. 0.23°C
B. 0.46°C
C. 2.3°C
D. 0.023°C

Answer

A

Explanation

mgh = `ms Delta theta`
mgh `= m xx 4.2 xx 10^(3) xx Delta theta`
`rArr Delta theta = (9.8 xx 100)/(4.2 xx 10^3) = 0.23^(@) C`.