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.
The Kelvin (symbol: K) is a unit of measurement for temperature, which also is one of the seven base units in the International System of Units (SI). The Kelvin is the major unit of measurement in the physical sciences, but is often used in conjunction with the degree Celsius.