The isotope known as carbon-14 is radioactive and will decay into the stable form nitrogen-14. as long as an organism is alive, it ingests air, and the level of carbon-14 in the organism remains the same. when it dies, it no longer absorbs carbon-14 from the air, and the carbon-14 in the organism decays. the half-life of carbon-14 is 5770 years. assume an organic sample is 14,000 years old. how many half-lives is 14,000 years?

The number of half lives in 14000 years is  2.4258.

Step-by-step explanation:

Initial amount of carbon-14 =

Final amount of carbon-14= N

Half life of carbon-14 =

Decay constant = k =

Age of the sample = t = 14,000 years

Formula used for number of half lives

where,

N= amount of reactant left after n-half lives

= Initial amount of the reactant

n = number of half lives

Taking log both sides

n = 2.4258

The number of half lives in 14000 years is  2.4258.

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there are 70 more legs than eyes at the dog show (196 – 126 = 70). dogs have two more legs than eyes, and humans have the same number of legs as eyes. thus 70 is twice the number of dogs at the show, so the number of dogs is half of 70, which is 35. to get the number of humans, subtract 35 from 63: 63 – 35 = 28.

step-by-step explanation: