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...

Damp Air

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

 

Puzzle ID:#8441
Fun:*** (2.76)
Difficulty:*** (2.17)
Category:Science
Submitted By:electronjohn*us****
Corrected By:phrebh

 

 

 



A cubic foot of dry air at standard pressure and temperature is weighed on a scale. Then a cubic foot of damp air at the same pressure and temperature is weighed. Which will weigh more?



Answer

The damp air weighs less because water molecules (molecular weight of 18) have replaced more massive molecules of air (nitrogen: molecular weight of 28, oxygen: molecular weight of 32). Both volumes have the same number of molecules. Therefore, a humidity increase lowers the barometer reading. The barometer pressure value gets lower as a storm approaches. (This question is from "Mad About Physics", a must have book for all science types.)
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
   



Users in Chat : Jmoney95 

Online Now: 13 users and 440 guests

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

Custom Search





Sign In A Create a free account