The half-life of a radioactive isotope depicts the measure of time that it takes half of the isotope in an example decay. On account of radiocarbon dating, the half-existence of carbon 14 is 5,730 years

The half-life of carbon-14 is 5730 years.

In this manner, after

1 half-life there is 50 % = 1/2 of the first amount left.

2 half-lives there is 25 % = 1/4 of the first amount left.

25% is two half-lives.

Every 50% of life requires 5730 years.

So two half-lives require 2 × 5730

6 0

3 years ago

What did Charles Darwin discover as a result of his experiments with breeding pigeons?

Veronika [31]

Charles Darwin noticed that among the same species there were variations in traits based upon geographical location. These changes may have evolved from climate differences, predator/prey relationships and food sources. This particular experiment was intended to duplicate natural selection by demonstrating the concepts with artificial selection. The result was that over time, new traits could be bred for. Although there may be more than one correct answer here, the best answer is the first; desirable traits can be selected and bred in offspring.

4 0

3 years ago

Earth's seasons are caused by

harkovskaia [24]

Answer:

B. Earth's rotation around its axis

Explanation:

5 0

2 years ago

Read 2 more answers

Choose all answers that apply

Nutka1998 [239]

Answer:

is made of a double layer of phospholipids

3 0

2 years ago