78.08% of nitrogen is on earths atmosphere
Answer:
A closed container designed to hold gases or liquids at a pressure substantially higher or lower than the ambient pressure
The answer for Part A is: In an action-reaction pair the forces work on different objects.
That sounds like magnification needs to be applied.
Attain the length of a real DNA and then measure the length of your specimen.
Magnification=length of specimen
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real length of DNA