Pressure in Beaker

  • Thread starter Nellen2222
  • Start date
  • #1
Nellen2222
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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 I am supposed to round up. Let me know what is wrong please!
 

Answers and Replies

  • #2
Nellen2222
55
0
Bump, anyone?
 
  • #3
Doc Al
Mentor
45,461
1,947
Answer sheet says 210 Newtons, and there are two sig digs in the question given. Either I did it wrong or I am 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
LawrenceC
1,198
5
Bumping is against the forum rules.

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

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