. The following instruments are available in your laboratory. What would be the
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Question
. The following instruments are available in your laboratory. What would be the absolute uncertainties in the measurements done by these instruments?
a. Ruler
b. Protractor
c. Watch
d. Scale
2. Measure the length of the pencil. Estimate the relative uncertainty in the measurement.
3. By using the instruments from the task 1, you have determined that it takes 3 s for a toy car to travel through the distance of 162 cm. What are the relative uncertainties of the distance and time measurements? Which measurement is more accurate?
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a. Ruler
b. Protractor
c. Watch
d. Scale
Explanation / Answer
1.
a - 0.5mm
b - 0.5o
c - 1 sec
d - 1g
2.
0.5/150=0.33%
3.
?d/d=0.5/1620=0.03%; ?t/t=1/3 = 33.3%
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