A calorimeter of negligible heat capacity contains 100cc of water at 40°C. The water cools to 35°C in 5minutes. The water is now replaced by K-oil of equal volume at 40°C. Find the time taken for the temperature to become 35°C under similar conditions. Specific heat capacities of water and K-oil are 4200J/kg-K and 2100J/kg-K respectively. Density of K-oil = 800kg/m3.
