If a number of small droplets of water each of radius r coalesce to form a single drop of radius R, then the rise of temperature is : (J = mechanical equivalent of heat, d= density of water, T= surface tension of water)

If a number of small droplets of water each of radius r coalesce to fo

1.	If a number of small droplets of water each of radius r coalesce to form a single drop of radius R, then the rise of temperature is : (J = mechanical equivalent of heat, d= density of water, T= surface tension of water)
Answer» `( 3 Td)/( J) ((1)/( R) - (1)/( r) )` `( 3 J)/( TD) ( (1)/( r) - ( 1)/( R ))` ` ( 3T)/( DJ)((1)/ (r ) - (1)/( R))` none Answer :C