Posted by Hannah on Thursday, August 30, 2012 at 10:27pm.
I had to do an experiment where a tiny steel ball was measured using a micrometer. There was then a series of calculations that needed to be completed and then a percent error had to be calculated. I think that my data may be incorrect or maybe I am just not doing the calculations correctly but my percent error keeps coming out to be very high.
To start off I had to use the micrometer to find the diameter D(mm) of the steel ball. 5 trials were completed. For the first trial I got 15.90 mm. The volume V=1/6(pi)D^3 had to be calculated next so to do this I plugged 15.9 into the equation 1/6(3.14)(15.90^3) and got 2019. For each trial I plugged my D value into the equation and then to calculate the average Volume I added all the numbers up and divided by 5.
So far before I continue can you please tell me if I did this correctly. Thank you for your help!!

Physics(Please help, thank you)  Elena, Friday, August 31, 2012 at 4:09am
1. Find the average magnitude of diameter
(D1+D2+D3+D4+D5)/5 ={D}
2. ΔD1 ={D}D1
ΔD2={D}D2
…
ΔD5 ={D}D5
Average absolute error is
{ΔD}= (ΔD1+,,,+ ΔD5)/5.
3. The relative error is {ΔD}/{D}
4. Since V~D³ the error of your result = 3• {ΔD}/{D}.
If you want it in %, multiply by 100.
Answer This Question
Related Questions
 Physics(Please help, thanks)  An experiment was done where a tiny steel ball ...
 Physics(Please check)  An experiment was done where a tiny steel ball was ...
 chemistry  So I did an experiment at school in which we had to form 2.00 grams ...
 Physics(Please answer, thank you)  How do you determine the ymax? I know you ...
 Chemistry  I had to perform an experiment for the freezing point depression in ...
 Chemistry  In 1909, Robert Millikan performed an experiment involving tiny, ...
 Chemistry  Can someone check my answers? These are based off of an experiment ...
 physics BASIC PLEASE HELP  Calculations and Data: Angle: As measured by ...
 Chemistry  To calculate the percent error you would use the error in ...
 Chemistry  Can someone check my answers? These are based off of an experiment ...
More Related Questions