When you work out it helps clear your thoughts and think of nothing. It makes you feel good.
Answer:
physical change
Explanation:
its only changing things you see.
Answer:
The convex lens is shaped so that all light rays that enter it parallel to its axis cross one another at a single point on the opposite side of the lens.
Explanation:
No the substance will remain the same substance as before.
Answer:
no:
Explanation:
it would grow and no longer be able to fit through the loop due to the hot air expanding.
