This is Giancoli Answers with Mr. Dychko. The heat gained by the automobile cooling system will be the mass of water in the cooling system times the specific heat capacity times the change in temperature. So, we're told there's 18 liters of water, and we have to multiply that by the density of water, 1 kilogram per liter in order to get the mass of water. And then times by the specific heat capacity of water, 4,186 joules per kelvin or kilogram Celsius degree, and then multiplied by the change in temperature of 95 degrees Celsius minus 15 degrees Celsius. And that gets about 6.0 times 10 to the 6 joules of energy absorbed.