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!

Determine equivalent vacuum for water depth

  1. Jul 6, 2015 #1
    Hello, I need to figure out the max water depth a motor will operate without water ingress. The plan is to use a vacuum pump to create differential pressure and correlate that to water depth. My issue is the correlation between the vacuum and pressure. Can someone please provide a formula for determining the equivalent water pressure which the motor can withstand based on the vacuum I can hold? The Max. Vacuum, of the pump is 25 Inches of Hg.

    Thanks
     
  2. jcsd
  3. Jul 6, 2015 #2
    I'm pretty sure rho g h will be in there somewhere.
     
  4. Jul 6, 2015 #3
    Mercury is 13.5 times denser than water , so 25 inHG = 337.7 inH2O = 28 ft of water.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Determine equivalent vacuum for water depth
  1. Water splash depth (Replies: 5)

Loading...