Which one of the following is responsible for the one-way nature ...

[audragclark]

Which one of the following is responsible for the one-way nature of time, i.e., for the distinction between past and future?
 
  A) the law of inertia
  B) the law of conservation of energy
  C) the second law of thermodynamics
  D) the gravitational force
  E) the electromagnetic force

Question 2

Why can't you directly observe, with the unaided eye, Brownian motion in easily visible objects such as floating bits of paper?
 
  A) Because atoms are so small that you can't see them with the unaided eye.
  B) Because only individual atoms and molecules exhibit Brownian motion.
  C) Because bits of paper are so massive or heavy that they do not respond noticeably to atomic impacts.
  D) Because paper cannot be electrically charged, so it cannot respond to Brownian forces by individual atoms.
  E) Because only living organisms such as bacteria exhibit Brownian motion.

[Rilsmarie951]

Answer to Question 1

C

Answer to Question 2

C

[audragclark]

Gracias!

[tkempin]

Excellent