Strange Phenomenon: Cracking Peanuts Releases Smoke

Click For Summary

Discussion Overview

The discussion revolves around the phenomenon of smoke-like emissions observed when cracking open peanut shells. Participants explore the physical nature of this effect, potential explanations related to the structure of peanuts, and related biological or evolutionary implications. The conversation includes personal observations and hypotheses regarding the mechanics behind the phenomenon.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant describes a method for cracking peanuts and observes a 'whisp of smoke' rising from the shell, suggesting it might be fine dust or aerosol.
  • Another participant proposes that the upward movement of the substance could be due to a micro air current created during the cracking process.
  • A different viewpoint questions the strength of the upward current, suggesting it might be influenced by warm air from the eater's body.
  • One participant notes that every peanut has one embryo and speculates that the fine nature of the material could contribute to its upward motion, influenced by microvortices.
  • There is a suggestion that the smoke effect may not occur if the shell is opened gently.

Areas of Agreement / Disagreement

Participants express differing views on the cause of the upward movement of the substance, with some attributing it to micro air currents and others considering the influence of warm air. The discussion remains unresolved regarding the exact nature and cause of the phenomenon.

Contextual Notes

Participants do not reach a consensus on the explanations for the observed phenomenon, and various assumptions about the mechanics of cracking peanuts and the resulting emissions are presented without resolution.

arcnets
Messages
493
Reaction score
0
Hi all,
maybe this is not the proper forum to post this. Because it rather belongs into a section 'strange effects in everyday life', or whatever. Well.

Yesterday I opened a bag of peanuts. The ones that have the closed shells which contain two nuts each. I found the best way to crack them was this:

- Grab the shell between right thumb and index finger, and also between left thumb and index finger, so that the shell is held by these 4 fingers.
- Hold it so that one nut is left, and the other is right.
- Find the line of symmetry (where the shell will crack), and align that with the horizontal.
- Now, use both hands like pincers, cracking the shell in the middle between the two nuts. The shell will crack cleanly into an upper and lower half.

I observed the following (which each single shell in the bag!):

- As the shell cracks, a 'whisp of smoke' rises from it, curling for a second or two in the air, much like you flicked a lighter or blew at a candle.

Of course, this is not smoke but probably a very fine dust or aerosol (like in oranges), but still here's my questions:

1) Can anybody reproduce the effect?
2) What is the physical nature of this, and can it be explained from the peanut's structure?
3) Why does this substance move up as if it was hot?
4) Is there any biological/evolutional sense in this?
5) Are there related phenomena?

Thanks!
 
Biology news on Phys.org
I have observed the same in the past, I just thought that it must be dried shell material due to the roasting process. It probably moves up because the micro air current that is created when it breaks open..

I have another interesting observation for you:

Did you ever look at the structure of the peanut when you take the two parts apart? You can actually see the peanut embryo inside! A tiny little plant, the leaves are outlined an the sack from which it would have grown
 
Originally posted by Monique
It probably moves up because the micro air current that is created when it breaks open..
No, I don't think the breaking causes an upward current. Not so strong, at least. The altitude I'm talking about is 15 cm or so. However, could be the warm air heated by the eater's body...
You can actually see the peanut embryo inside!
Interesting. I'll have a look next time I eat them. Is there one or two embryos in a two-nut shell?
 
Every peanut has one embryo. Maybe the upward motion of the 'smoke' is because the material is very fine/light and IS thus influenced by the microvortex created by breaking open the shell. This smoke won't appear when you open it in a non-forcefull way, would it?
 

Similar threads

Undergrad A Bold New Take on Quantum Theory
  • · Replies 25 ·
Replies
25
Views
6K
Countdown to Doom Release: Revisit the Original and Celebrate with Easter Eggs
  • · Replies 14 ·
Replies
14
Views
6K
Graduate Strange Spam Email (The Limitation of the Photon Hypothesis)
  • · Replies 2 ·
Replies
2
Views
2K
Do Movies Teach Us Realistic Life Skills?
  • · Replies 1 ·
Replies
1
Views
11K