The age of the given rock is 700 million years.
The given parameters;
- <em>original mass of the rock, = 20 g</em>
- <em>mass of the rock remaining after decay, = 10 g</em>
- <em>half life of Uranium, </em>
<em> = 700 years</em>
age of the rock ----------------------------- mass remaining
0 
------------------------------------------- 20 g
1 half life (
) ------------------------------ 10 g
Age of the rock 
Thus, the age of the given rock is 700 million years.
Learn more here:brainly.com/question/23774743
9.81 meters per second squared
Answer:
The beetles consume the trees as food. So, if the trend continues, it’s likely that the trees will die out in the coming years
Explanation:
Answer:
Explanation:
It is easier to see clothes with pointed needle than a blunt one because pressure exerted is more in a pointed needle as it occupies less space compared to blunt needle, A blunt has more surface area so the pressure exerted will less as compared to a pointed needle.
IF YOU FOUND MY ANSWER USEFUL THEN PLEASE MARK ME BRAINLIEST.
Answer:
b.
c.
e.
h.
Explanation:
If we consider the ball,the tension is not balance by weight then the force acting will be non zero.It means that train car in not inertial frame of reference.And the same time the train car must accelerated with respected to the earth.It is not moving straight path.When train is in rest position but the string will be at the constant angle.
So the following option are correct:
b.
c.
e.
h.
