Problems are listed in approximate order of difficulty. A single dot (•) indicates straightforward problems involving just one main concept and sometimes requiring no more than substitution of numbers in the appropriate formula. Two dots (••) identify problems that are slightly more challenging and usually involve more than one concept. Three dots (•••) indicate problems that are distinctly more challenging, either because they are intrinsically difficult or involve lengthy calculations. Needless to say, these distinctions are hard to draw and are only approximate.
•• The carbon in living organisms contains about 1.3 atoms of 14C for every 1012 atoms of all kinds of carbon, and the half-life of 14C is 5730 years. (a) How many decays would one expect per minute from 7 g of carbon taken from a living tree? (b) If 7 g of carbon is extracted from a wooden beam of a prehistoric dwelling and if they undergo 10 decays per minute about how old is the dwelling?
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.