Answer:Radon.
Explanation: The main source of Radon is the Gaseous decay of Uranium found in the rocks into Radium, Radium also undergoes direct radioactive decay into RADON it is usually found in the rocks.
Radon is a radioactive noble gas that is colourless,odourless and tasteless, it has an atomic number of 86. Inhaling Radon is very toxic and poisonous to the health of man as it leads to different forms of breathing issues, it lead to thightening of the chest, difficulty swallowing etc.
Einstein's equations showed that matter could be converted into energy; and vice-versa
☺☺☺☺
Great question !
The rate at which an object covers distance, without worrying
about the direction it's moving, is the object's SPEED .
When the direction is also given, then you have the object's VELOCITY.
This question is important. It gives us a chance to point out that
"velocity" is not just a fancy word for speed that you use when you
want to sound smart. There's actually an important difference between
'speed' and 'velocity'.
Answer:
Explanation:
The most common formula for average speed is distance traveled divided by time taken. The other formula, if you have the initial and final speed, add the two together, and divide by 2
