| Name__________________________ |
Section____________________________ |
This page is designed to help students practice written problems, and is
meant to be printed out. Hit the print command and show all work in the spaces
provided. Use the 5-step method, and be sure to round you answers correctly.
(Observed Value - True Value)
Percent Error = -------------------------------------------------- x 100
True Value
| 1. Working in the laboratory, a student find
the density of a piece of pure aluminum to be 2.85 g/cm3. The accepted
value for the density of aluminum is 2.699 g/cm3. What is the student's
percent error?
|
| 2. A student experimentally determines the
specific heat of water to be 4.29 J/g x Co. He then looks up the specific
heat of water on a reference table and finds that is is 4.18 J/g x Co.
What is his percent error?
|
| 3. A student takes an object with an accepted
mass of 200.00 grams and masses it on his own balance. He records the mass of the
object as 196.5 g. What is his percent error?
|
Answers 1)
5.59%
2) 2.63%
3) -1.75% |
Please forward all questions, comments and criticisms to Gregory L. Curran.
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Last Modified September 14, 2007 |