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!

Tapering Mercury Barometer

  1. Jul 18, 2015 #1
    I am curious if the height of the Mercury column inside a Toricellian Mercury Barometer be the same if we use a tapering / stepped (unequal inner diameter [ID]) glass tube as depicted in the image below instead of a regular constant ID one?

    Note: I know that the ID of a barometer tube does not affect the Mercury column height as long as the ID of the tube remains the same.

  2. jcsd
  3. Jul 18, 2015 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member
    2017 Award

    The only relevant thing is the pressure at the bottom of the column, i.e., the height of the column. Whether the diameter changes or not is irrelevant.
  4. Jul 19, 2015 #3
    Thank you for the quick clarification. Physics Forums rocks :smile:
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook

Similar Threads for Tapering Mercury Barometer
I Would HE light applied to mercury vapor produce electricity?