Answer:
The image seems to be behind the mirror, but nothing is really there.
Explanation:
Sample response edge 2021
What is the SI (metric) unit of FORCE?
with symbol ( N )
All the best !
white star
because it is the hottest form of a star
Let No be initial no of atoms
N = N0 / 2 after 1 half-life
N = N0 / 4 after 2 half-lives
So after 2 half-lives 20 of the 80 atoms remain