Answer:
the last one is wrong
Explanation:
wrong : most of the mass of an atom comes from the electrons cloud
Watch melissa maribel explains it amazingly on her yt channel
The answer to the question is 300meters.
I don't know what you mean by the question, but in science it is Newton's second law.
"The second law explains how the velocity of an object changes when it is subjected to an external force."
I hope this helped!+*♡