July 17, 2024, 07:04:15 AM
Forum Rules: Read This Before Posting


Topic: About error propagation-Help me please....  (Read 3327 times)

0 Members and 1 Guest are viewing this topic.

Offline Hazel

  • Regular Member
  • ***
  • Posts: 22
  • Mole Snacks: +0/-0
About error propagation-Help me please....
« on: May 03, 2008, 09:53:22 AM »
I have a question about error propagation and it is quite basic... :'( :'( :'(

The question is

x=2.843(+-0.002)
y=58.5
z=100.00(+-0.08)

P=(x/y)/z. Find P.

My calculation is,

x/y=0.04860(+-0.00003)   I take four significant figures here.

P=0.04860(+-0.00003) /100.00(0.08)

Rabs=(((0.00003/0.04860)^2+(0.08/100.00)^2)^(1/2))*(0.04860/100.00)
      =4.912 x 10-7

P=4.86 x 10-4(+- Rabs)
I have found problem here..I don't know how to round up and how many figures should I take here. :-[ :-[ :-[
« Last Edit: May 04, 2008, 04:42:08 AM by Hazel »

Sponsored Links