Brain Teasers
Brain Teasers Trivia Mentalrobics Games Community
Personal Links
Submit a Teaser
Your Favorites
Your Watchlist
Browse Teasers
All

Cryptography
Group
Language
Letter-Equations
Logic
Logic-Grid
Math
Mystery
Optical-Illusions
Other
Probability
Rebus
Riddle
Science
Series
Situation
Trick
Trivia

Random
Daily Teasers
Search Teasers

Advanced Search
Add to Google Add to del.icio.us

More ways to get Braingle...

Magnet Race

Science brain teasers require understanding of the physical or biological world and the laws that govern it.

 

Puzzle ID:#25825
Fun:*** (2.77)
Difficulty:*** (2.37)
Category:Science
Submitted By:phrebh*us****
Corrected By:drussel3

 

 

 



Fred and Bob are racing cylindrical magnets down tubes of various materials. All of the magnets weigh the same and have the same dimensions. All of the tubes are the same length and have an inner diameter just larger than the outer diameter of the magnets. There is negligible friction when the magnets travel through the tubes.

Since they don't want the magnets to get stuck, Fred and Bob are using non-ferrous materials that magnets won't stick to. They have one tube for each material: wood, glass, aluminum, and plastic. Each of the tubes is set up at the same angle with respect to the floor and they are all in the same room on Earth.

Assuming they have a perfect method of timing each run, which tube has the longest time?




What Next?

  
  

See another brain teaser just like this one...

Or, just get a random brain teaser

If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.

 






Back to Top
   



Users in Chat : None 

Online Now: 4 users and 442 guests

Copyright © 1999-2014 | Updates | FAQ | RSS | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise

Custom Search





Sign In A Create a free account