Answer:
An airplane flying
Explanation:
Both a bird and airplane fly, but the airplane is using more mechanical energy to run and power the plane, causing it to fly.
Answer:
Atomic mass is the weighted average mass of an atom of an element based on the relative natural abundance of that element's isotopes. The mass number is a count of the total number of protons and neutrons in an atom's nucleus.
When you grow your brain grows its very complicated you cant just GET smart you have to learn easy stuff like 2+2 to 83x17 more you grow more your brain grows more stuff you learn but to get smarter read more do math more JUST DO EVERYTHING MORE to grow your brain and fill in your brain
