cakecup2018
  • cakecup2018
I NEED HELP !!! WITH RELATIVE ERROR, ABSOLUTE ERROR, AND PERCENT ERROR, ! WILL GIVE A METAL!!!
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
whpalmer4
  • whpalmer4
What's the question, specifically?
cakecup2018
  • cakecup2018
Well its not specific questions i just need the whole subject, but i can give you an example
whpalmer4
  • whpalmer4
okay, fire away

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cakecup2018
  • cakecup2018
Bob was told to measure 45 cm of copper wire to use in an experiment. Since his ruler only measured to 48 cm he used this amount, and his experiment was a failure. How much error did Bob introduce into his experiment?
cakecup2018
  • cakecup2018
give the absolute error, relative error, and percent error..
cakecup2018
  • cakecup2018
i have my exam tomorrow so i need help with a couple other things too
whpalmer4
  • whpalmer4
Well, absolute error is the difference between your measurement and the correct (or accepted) amount. It is always a positive number, so it is the absolute value of your measurement minus the correct value. \[\text{absolute error} = |\text{measurement} - \text{correct value}|\] Relative error is the fraction of absolute error divided by correct value. \[\text{relative error} = \frac{\text{absolute error}}{\text{correct value}} = \frac{|\text{measurement} - \text{correct value}|}{\text{correct value}}\] Percent error is simply relative error expressed as a percentage: \[\text{percent error} = \text{relative error} * 100\%\]or\[\text{percent error} = \frac{|\text{measurement} - \text{correct value}|}{\text{correct value}}*100\%\]
cakecup2018
  • cakecup2018
so can we do it the example together?
cakecup2018
  • cakecup2018
r u there @whpalmer4 ??
whpalmer4
  • whpalmer4
okay, use what I just said and come up with answers. I'll tell you if I agree or not.
cakecup2018
  • cakecup2018
0.0625
whpalmer4
  • whpalmer4
Okay, the problem asks for 3 different results. You just gave me 1 number. I would mark that wrong, even if it turns out to be one of the 3 numbers, because you didn't tell me which one it is.
whpalmer4
  • whpalmer4
Examples of good and bad answers: Bad: 0.0625 Good: The relative error is 0.0625.

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