Brain Teasers Optical Illusions Puzzle Hunts Codes & Ciphers Mechanical Puzzles
Personal Links
Browse Teasers
Search Teasers

Detention Bound

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

 

Puzzle ID:#3642
Fun:*** (2.95)
Difficulty:** (1.65)
Category:Science
Submitted By:Bobbrt*****

 

 

 



In a high school science class, Jimmy was given 50 milliliters of water and 50 milliliters of ethanol. His task was to mix them together and then run an experiment on the mixture. When the teacher came to check on him, however, Jimmy's mixture only contained 94 milliliters. The teacher accused him of drinking some of the mixture in an attempt to get intoxicated and immediately sent him to the principal. Jimmy swears that he did not drink the mixture and that he didn't lose any of the liquids by any means. What happened to the other six milliliters, and how could Jimmy prove his innocence?


Answer

When liquids are mixed, the molecules can arrange themselves so that they fit together more tightly than either of the original, pure liquids. A good way to visualize this is to picture a box completely filled with billiard balls (representing large molecules). If you pour a small amount of sand (representing small molecules) into the box, the sand will fill the voids between the billiard balls. The mass in the box will increase, but the total volume will not change. This is how Jimmy could prove his innocence - if he weighs the mixture, it will equal the original weight of the water plus the weight of the ethanol.
Hide




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
   


Online Now
4 users and 595 guests

Users In Chat
Aviator
Follow Braingle!
Fold 'N Fly Paper Airplanes
Easy to follow folding instructions and videos.
Copyright © 1999-2017 | FAQ | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise | Braingle Time: 7:32 pm
Sign In Create a free account