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:
The US purchases more products from other countries such as China, however those countries doesn't purchase products from the US.
Other countries have an excess supply of US dollars that they invest in US like real estate. That provides those countries the ability to influence the US economy by pulling out their investments. US stock markets allow people to invest in financial products around the world. Stock markets in other countries allow foreigners to invest in the United States.
Explanation:
Answer:The eastern Terai is cooler than the western one because it is closer to the sea (Bay of Bengal).
<h2>Answer:</h2>
This problem can be solved using trigonomtry, assuming that the figure formed by Adam's shadow and Adam himself is a Right Triangle (as shown in the figure attached).
According to this, the distance from the tip of the shadow to the top of Adam's head is the hypotenuse 
of the triangle, and we already know Adam's height and the angle of elevation. So, the trigonometric function that best works in this case is sine:
Where the opposite leg is the side of the triangle that is opposite to the 
angle.
In this especific case:
(1)
In order to know the value of the hypotenuse we have to find from equation (1):
Rounding:
>>>>>This is the distance from the tip of the shadow to the top of Adam's head
