Life Insurance Mortality Tables. Life insurance companies use what is called a Life Insurance Mortality Table (aka actuarial table or life table) to come up with policy rates. This table takes your age and calculates how many years you have left to live if you live to the average life expectancy.
Rust is the normal electrochemical process of metals returning to their natural unrefined state. It occurs when Iron, Oxygen and Water (air moisture) combine. The rusting process can be accelerated when Iron is subjected to nature's minerals, chemicals and temperature fluctuations.
The causes of rusting. 1  Tube 1 â water and air. 2  Tube 2 â water but no air (it is removed during boiling and the oil prevents any extra from dissolving in the water and reaching the nail) 3  Tube 3 â water, air and salt.  Tube 4 â air, no water (the calcium chloride removes the water from the air and the bung prevents any extra from entering.)