Section 7. Mean free path and diffusion

7.2 

How to draw random walks

Here, how to make a rotatable 3D illustration of random walks with the aid of R is given.

R is a very powerful statistics programming language available from

CRAN: https://cran.r-project.org

Is gravity an entropic force?

Read 

E. Verlinde, On the origin of gravity and the laws of Newton\v\\

J High Energy Phys 04 , 029 (2011).

Abstract: 

Starting from first principles and general assumptions we present a heuristic argument that shows that Newton's law of gravitation naturally arises in a theory in which space emerges through a holographic scenario. Gravity is identified with an entropic force caused by changes in the information associated with the positions of material bodies. A relativistic generalization of the presented arguments directly leads to the Einstein equations. When space is emergent even Newton's law of inertia needs to be explained. The equivalence principle suggests that it is actually the law of inertia whose origin is entropic.