An annuity can be a single life annuity or a joint life annuity where the payments are guaranteed until the death of the second annuitant. It is regarded as ideal for retirees as it is the only income of any financial product that is fully guaranteed.
Definition: The Kelvin temperature scale is an absolute temperature scale based on the definition that the volume of a gas at constant (low) pressure is directly proportional to temperature and that 100 degrees separates the freezing and boiling points of water.
Celsius (C) is a temperature scale based on 0 degrees as the freezing point of water and 100 degrees as the boiling point of water at sea level. Kelvin (K), also called the absolute scale, is a temperature scale that has intervals equivalent to the Celsius scale, but begins at absolute zero.