Answer:
It is supported by many different experiments.
Explanation:
Scientific theory is based on different experiments and tested in different situations and environment will all aspects. If the experiment finds true then observations will become theory. It can be changed in future if it does not meet the newly proposed conditions. But It does not means that, every theory can be changed.
The conversion factor is 10 to the 9th power
Answer:
option 1
Explanation:
it is because they need better security for operational
Answer:
what do you mean friend not for teacher
