a pure gold ring with a volume of 1.56 cm^3 is initially at 15.2 degrees c. When its put on, it warms to 25.8 degrees c. How much heat did the ring absorb? (denisity of gold=19.3 g/cm^3)

How many kilowatt hours of energy are necessary to heat the water in the water heater by 25 degrees c? (heater holds 54 gallons)