1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Why didn't water entere the bottle?

  1. Jan 9, 2013 #1
    Hi,

    I put an overturned bottle inside a container filled with 0.5 m of water but water didn't enter inside the bottle.
    Pressure acting out the bottle when is immersed is air pressure plus water pressure at its height and pressure inside bottle is just air so why didn't water entered the bottle ? Is it about gravity ?

    Thank you
     
    Last edited by a moderator: Feb 4, 2013
  2. jcsd
  3. Jan 9, 2013 #2

    Low-Q

    User Avatar
    Gold Member

    Re: pressure

    Air is compressible. Some water will enter the bottle, but not more than the water pressure allows with respect to the pressure and volume inside the bottle. 0.5m down in the water the pressure is only 1.049 bar, and the air above waterlevel is 1 bar. A difference of only 4.9%. However, you should see that some water enter the bottle.

    Water pressure is a function of its mass and gravity. The deeper you go, the more mass are above you, the higher the pressure. If you submerge the bottle deep enough the pressure will fill the bottle with water almost completely. But still there is the same mass of air inside - just compressed into a very small space.
     
  4. Jan 9, 2013 #3
    Re: pressure

    So doesn't enter much water at 0.5 m because water compress air increasing its pressure ?
     
  5. Jan 9, 2013 #4

    jbriggs444

    User Avatar
    Science Advisor

    Re: pressure

    Not much water enters because 0.5 meters worth of pressure does not compress the air very much.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Why didn't water entere the bottle?
  1. Water Bottle (Replies: 6)

  2. Water bottle (Replies: 4)

Loading...