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.
There are four common scales, Fahrenheit, Celsius, Rankine, and Kelvin. Kelvin is the scale used most often in professional science. They are each measured using thermometers attuned to their scales. The first two use properties of water to determine a temperature of zero, whereas the second two begin at absolute zero.