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a).What is half-life?
b) Archeologists can determine the age of organic matter by measuring the proportion of carbon-14
present in a sample. Assuming that carbon-14 has a half- life of 5600 years, calculate the age of a piece of wood found to contain `1/8` as much carbon-14 as in a living material.

Answer Text:
a).Time taken for a given mass or number or activity of nuclides to decay to half its original value.
b).`1/8 x = x {1/2}^(t/5600)`
`0.125 = (0.5)^(t/5600)`
`Log 0.125 = t/(5600) log 0.5`
`t/5600 = log0.125/log0.5`
`t/5600 =3`

t = 3 x 5600 =16800 years