Answer:
After three half-lives, it is 7:1
Explanation:
- The rate at which the decay of the radioactive isotope is said to be half-life and is represented as the half-life of the atoms and the matter to disintegrate itself.
- The two radioactive isotopes are K 40 and Ar 40. After the K-Ar dating, they contain minerals such as the clay mica and the temphra minerals and Half-life of the K 40 is 1.3 more than 100,000 years i.e 10x9 years for Ar 40.
- <u>Thus the K 40 has to divide as three half-lives have passed if the ratio of argon to potassium atoms is 7:1. At the end of one half-life, the ratio of the number of argon to potassium atoms is 1:1. and two half lives its 3:1 thus after the third half-life it becomes as 7:1.</u>
Answer:
eiffel tower Champs de mars at 5 Avenue Anatole France within the 7th arrondissement of Paris.
pantheon The oculus in the Pantheon, Rome. The Pantheon was dedicated in ad 609 as the Church of Santa Maria Rotonda, or Santa Maria ad Martyres, which it remains today.
Explanation:
The only disadvantage I could think of would be price of equipment needed to produce energy from the source (i.e. price of solar panels)
