Name of this law ?

  • Thread starter Moneer81
  • Start date
  • #1
Moneer81
159
2
hey,

I saw a question on "Who Wants to Be a Millionaire" about a physics law where for example shaking a jar containing a big number of objects (like rocks, or chestnuts) will result in the bigger ones rising to the surface. I never got the chance to find the answer but does anyone know the name of this law so I can google it? or does anyone know how this works?
 

Answers and Replies

  • #2
krab
Science Advisor
893
3
It's not a "law"; it's an effect: the "Brazil Nut Effect".
 
  • #3
brewnog
Science Advisor
Gold Member
2,739
7
Percolation, surely?

It's essentially the effect of small particles falling through the gaps between large particles.
 
  • #4
pete worthington
55
0
The gaps are created by the larger material interfacing and colliding with other larger material. Why does the smaller material fall through the gaps?
 
  • #5
mapper
121
0
"Why does the smaller material fall through the gaps?"
Gravity
 
  • #6
ohwilleke
Gold Member
2,040
860
Unless the objects are very regular in shape, the large objects have larger gaps between them than the small objects, on average. The small objects can't make it between the gaps between small objects, but can make it between the gaps between large objects.
 

Suggested for: Name of this law ?

  • Last Post
Replies
5
Views
800
Replies
1
Views
400
Replies
16
Views
1K
Replies
2
Views
545
Replies
1
Views
1K
  • Last Post
Replies
5
Views
678
  • Last Post
Replies
8
Views
4K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
4
Views
703
Replies
4
Views
1K
Top