Chemical Forums
1 Hour
1 Day
1 Week
1 Month
Forever
October 06, 2024, 01:15:07 AM
Forum Rules
: Read This Before Posting
Home
Help
Search
Login
Register
Chemical Forums
Chemistry Forums for Students
Undergraduate General Chemistry Forum
Percent uncertainty
« previous
next »
Print
Pages: [
1
]
Go Down
Topic: Percent uncertainty (Read 5350 times)
0 Members and 1 Guest are viewing this topic.
bpeck8
Regular Member
Posts: 47
Mole Snacks: +1/-1
Percent uncertainty
«
on:
November 05, 2009, 05:42:23 PM »
I do not understand how to calculate this. Is it the same as finding percent error except you take large value minus small value divide by large value times hundred?
Here is the question on my lab report:
The temperature measurements have a uncertainty of 0.1 degree C. Calculate the percent uncertainty for each value of T H2O.
My T H2O values are 0.2 1.8 1.6
Logged
Bob Sacamano
Regular Member
Posts: 63
Mole Snacks: +1/-3
Re: Percent uncertainty
«
Reply #1 on:
November 05, 2009, 10:51:32 PM »
It states the uncertainty in each measurement is 0.1.
This means the value you measured is within that value plus or minus 0.1.
For your first T it would be written as 0.2
+
0.1
They want you to express the second term as a percentage so in this case it would be
0.2
+
50%
Logged
bpeck8
Regular Member
Posts: 47
Mole Snacks: +1/-1
Re: Percent uncertainty
«
Reply #2 on:
November 05, 2009, 11:26:27 PM »
thanks a lot, so 0.2 +-50%, 1.8 +-5.5%, 1.6 +-6.2%
Sorry i do not know how to type the +- sign like you did.
Logged
JGK
Chemist
Full Member
Posts: 738
Mole Snacks: +66/-19
Gender:
Re: Percent uncertainty
«
Reply #3 on:
November 06, 2009, 09:23:35 AM »
± is Alt[241] on every PC i've used. if you are a Mac user then I've no idea
Logged
Experience is something you don't get until just after you need it.
Print
Pages: [
1
]
Go Up
« previous
next »
Sponsored Links
Chemical Forums
Chemistry Forums for Students
Undergraduate General Chemistry Forum
Percent uncertainty