You are Here: Home >< Physics

# fluid mechanics Watch

1. I don't know where else to post this

From measurements taken on the variation of pressure with depth in a liquid, it was found that, on a certain day, 2m below the surface of a given liquid, the absolute pressure was 1.17 x 105N/m2, while at a depth of 5m the absolute pressure was 142kN/m2. Find a) the relative density of the liquid

what formula can i use
2. (Original post by cushticwarrior)
I don't know where else to post this

From measurements taken on the variation of pressure with depth in a liquid, it was found that, on a certain day, 2m below the surface of a given liquid, the absolute pressure was 1.17 x 105N/m2, while at a depth of 5m the absolute pressure was 142kN/m2. Find a) the relative density of the liquid

what formula can i use
3. (Original post by langlitz)

1x10^5/(9.81*2)=5963 This is not the answer given. Do you know what I am doing wrong
4. (Original post by cushticwarrior)

1x10^5/(9.81*2)=5963 This is not the answer given. Do you know what I am doing wrong
5. (Original post by langlitz)
0.8 something, relative density.
6. (Original post by cushticwarrior)
0.8 something, relative density.
You need to use the difference in pressure and the difference in height: ΔP = ρgΔh
7. Thank you!

TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Updated: May 2, 2016
Today on TSR

### Am I pregnant?

...or just paranoid?

### Have I ruined my eyebrows

Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• Poll
Discussions on TSR

• Latest
• ## See more of what you like on The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

• The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.