1. Uncertainty is at least +1/10 of smallest interval.
QUESTION:
What is the proper way of reporting the temperature shown on the thermometer scale (Celsius) below?
A. 30oC, B. 30.0oC, C oC D. 3.0x101 oC
Uncertainty is at least +1/10 of smallest interval.
Smallest interval: 0.1oC
What is the proper way of reporting the temperature shown on the thermometer scale shown here.?
Assume that the scale is in degrees Celsius.
A. 30oC, B. 30.0oC, C oC D. 3.0x101 oC
PAUSE 3 seconds.
THe way a measurement is reported should imply the uncertainty in the measurement.
CLICK
For an analog scale, the uncertainty is generally assumed to be at least 1/10 of the smallest interval.
CLICK The smallest interval shown on this scale is 0.1 degrees celsius.
For example, this is the 30.1 degree mark.
and the next mark...
CLICK is the 30.2 degree mark
CLICK Therefore, the uncertainty of any reading made from this scale is at least 1/0 of the 0.1 degrees.
1/10 of 0.1 is one one-hundredth
HIGHLIGHT 0.01oC
Therefore, the last significant digit of any reading from this scale should be the digit in the hundredth’s place.
Therefore, the correct answer is Choice C, degrees celsius.
PAUSE
CLICK PAUSE
END RECORDING
Therefore, uncertainty is + (1/10 of 0.1oC), or +0.01oC
Therefore, last sig.fig. should be in hundredths place.

2. Video ID: 1A-3-2 © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Narrator: Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08