`30 gms` of water at `30^@C` is in a beaker. Which of the following, when added to water, will have
Channel: Doubtnut
Date: 09/02/2020

`30 gms` of water at `30^@C` is in a beaker. Which of the following, when added to water, will have greatest cooling effect ? (Specific heat of copper `= 0.1 cal//gm^@C`)