Answer:
The answer is
<h2>0.4 g/cm³</h2>Explanation:
The density of a substance can be found by using the formula
From the question
mass of wood = 120 g
volume = 300 cm³
So the density of the wood is
We have the final answer as
<h3>0.4 g/cm³</h3>Hope this helps you
A. The radioactive decay equation is N = N0
where T is the half-life (5730 years), N0 is the number of atoms at time t = 0 and N is the number at time t.
Rewriting this as:
(N/N0) =
Since N = (1/8) N0 and substituting known values:
1/8 =
Taking ln of both sides:
ln(1/8)= -ln(2)*t/5730
t = - 5730 * ln(1/8) / ln (2)
t = 17,190 years
The tree was cut down 17,190 years ago.
B. N0 = 1,500,000 carbon-14 atoms
Since N = (1/8) N0
N = 187,500 carbon atoms left