Asample has a c614 activity of 0.0015 bq per gram of carbon.
(a) find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 bq.
(b) evidence suggests that the value of 0.23 bq might have been as much as 45% larger. repeat part (a), taking into account this 45% increase.

Explanation:

Two important equations in radioactive decay are

We use them for carbon dating.

(a) Initial activity = 0.23 Bq

(i) Calculate the rate constant

The half-life of ¹⁴C is 5730 yr.

(ii) Calculate the age of the sample

(b) Initial activity =  45 % larger

N₀ = 1.45 × 0.230 Bq = 0.334 Bq

what's the

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.