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)

30 gms of water at 30°C is in a beaker. Which of the following, when

1.	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)
Answer» 100 GM of water at `10^(@) C` 15 GMS of water at `0^(@) C` 3 gms of ice at `0^(@) C` 18 gms of copper at `0^(@) C` Answer :A