• Support PF! Buy your school textbooks, materials and every day products Here!

Pressure in Beaker

  • Thread starter Nellen2222
  • Start date
  • #1
55
0

Homework Statement




A 35 cm tall , 5 cm diamater cyldrical beaker is filled to its brim with water. whatis the donward force on the bottom of the beaker?

Homework Equations



p= po+ d*g*h
F= p*A
density of water is 1000

The Attempt at a Solution



p= 1.013*10^5 + 1000*9.8*0.35
p = 104,730 Pa

F= 104730 Pa * pi(0.025)^2 = 205.636 N

Answer sheet says 210 newtons, and there are two sig digs in the question given. Either I did it wrong or Im supposed to round up. Let me know what is wrong please!!
 

Answers and Replies

  • #2
55
0
Bump, anyone?
 
  • #3
Doc Al
Mentor
44,867
1,114
Answer sheet says 210 newtons, and there are two sig digs in the question given. Either I did it wrong or Im supposed to round up. Let me know what is wrong please!!
Looks OK to me. Round it up to two significant figures.

(And don't be bumping after just 30 minutes!)
 
  • #4
1,197
0
Bumping is against the forum rules.

It's due to roundoff. The net force on the bottom is onlly d*g*h.
 

Related Threads for: Pressure in Beaker

  • Last Post
2
Replies
38
Views
30K
  • Last Post
Replies
12
Views
752
  • Last Post
Replies
2
Views
16K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
9
Views
2K
Replies
1
Views
1K
Replies
2
Views
2K
  • Last Post
Replies
0
Views
2K
Top