Absolute pressure question

  • Thread starter J0hnnyD
  • Start date
  • #1
4
0
Problem:

An air bubble originating froman under water
diver has a radius of 5 mm at some depth h.
When the bubble reaches the surface of the
water, it has a radius of 7.4 mm.
Assuming the temperature of the air in the
bubble remains constant, determine the abso-
lute pressure at this depth h. The acceleration
of gravity is 9.8 m/s2 .
Answer in units of Pa.

Homework Equations


what I need to know. Is this a PV=nRT question??


The Attempt at a Solution



I dont need to know the answer to the question, just what equation to use to find the absolute pressure. there is a follow up question to determine the depth of the diver as well.
 

Answers and Replies

  • #2
4
0
I simplified it to P1V1=P2V2 and solved for P1 and got the answer. Anyone know how to find the depth of the diver given all these variables?
 
  • #3
Mapes
Science Advisor
Homework Helper
Gold Member
2,593
20
Hi J0hnnyD, welcome to PF. Do you know how to find the hydrostatic pressure at a certain depth in a fluid?
 

Related Threads on Absolute pressure question

Replies
4
Views
3K
  • Last Post
Replies
9
Views
1K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
0
Views
4K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
1
Views
9K
  • Last Post
Replies
1
Views
884
Replies
4
Views
24K
  • Last Post
Replies
6
Views
8K
  • Last Post
Replies
2
Views
404
Top