They both are two different elements.SO the answer is Element
The ball can't reach the speed of 20 m/s in two seconds, unless you THROW it down from the window with a little bit of initial speed. If you just drop it, then the highest speed it can have after two seconds is 19.6 m/s .
If an object starts from rest and its speed after 2 seconds is 20 m/s, then its acceleration is 20/2 = 10 m/s^2 .
(Gravity on Earth is only 9.8 m/s^2.)
A) 1973 I believe it had something to do with the Arab wars happening at the time
Mitochondria is the cell organelle the provides energy to function it also helps in respiration .It is called also as the power house of the cell
