The Naked Scientists

The Naked Scientists Forum

Author Topic: Why does a wet towel make a cracking sound when flicked?  (Read 6102 times)

ALLIYU

  • Guest
ALLIYU asked the Naked Scientists:
   
When a wet towel is flicked, it creates a cracking sound like a whip.  What is this effect and why does a wet towel crack louder than a dry one?

What do you think?
« Last Edit: 27/04/2010 01:30:04 by _system »


 

Offline grizelda

  • Hero Member
  • *****
  • Posts: 740
    • View Profile
Why does a wet towel make a cracking sound when flicked?
« Reply #1 on: 27/04/2010 11:28:47 »
The tip of the towel is accelerated past the speed of sound, so you hear a small sonic boom. Possibly some of the moisture suddenly boils away from the heat caused by friction at that speed so you may also hear that.
 

Offline yor_on

  • Naked Science Forum GOD!
  • *******
  • Posts: 11993
  • Thanked: 4 times
  • (Ah, yes:) *a table is always good to hide under*
    • View Profile
Why does a wet towel make a cracking sound when flicked?
« Reply #2 on: 28/04/2010 01:24:27 »
Well a wet towel is heavier, maybe that have something to do with the sound? Just a guess :)
 

The Naked Scientists Forum

Why does a wet towel make a cracking sound when flicked?
« Reply #2 on: 28/04/2010 01:24:27 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums
 
Login
Login with username, password and session length