Brownian motion is caused by A) thermal agitation. B) ...

[Garrulous]

Brownian motion is caused by
 
  A) thermal agitation.
  B) perpetual motion.
  C) particles larger than atoms bumping into them.
  D) interactions between atoms and molecules.
  E) almost invisible bugs.

Question 2

Assuming all the atoms exhaled by Julius Caesar in his last dying breath are still in the atmosphere, we breathe in at least one of them each
 
  A) single breath.
  B) day.
  C) month.
  D) ten years.
  E) can't say for some people breathe a few of Caesar's atoms daily, while others never.

[Dominic]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: A

[Garrulous]

TYSM

[Animal_Goddess]

Excellent