Synoptic Flashcards
1
Q
critique results model answer
A
- Comment on precision (sig fig consistency)
- repeat reading
- enough results
- look for inconsistent intervals between readings
2
Q
making results more accurate
A
- parallax error (record at eye level)
- fiducial markers as reference points
- set square to make sure rulers are vertical
- averages to reduce random error
3
Q
absolute uncertaintity
A
the uncertainty from the measuring device
4
Q
uncertainty of repeat readings
A
uncertainty = half the range of the repeats
data = mean +- uncertaintity
5
Q
percentage uncertaintity
A
absolute uncertainty / reading * 100
6
Q
accurate
A
near the true value
7
Q
precise
A
results are grouped together
8
Q
compounding uncertainties
A
- convert absolute uncertainty to percentage uncertainty
- combine the uncertainties
- convert back to absolute uncertainties (multiple by value)
9
Q
compound uncertainty rules
A
- multiplying/ dividing ADD THE UNCERTAINTIES
- powers MULTIPLY BY EXPONENT
10
Q
systematic error
A
fault with equipment e.g. zero error
11
Q
random error
A
due to human error e.g. human reaction time
12
Q
reading of a micrometer
A
- read the first two digits off the barrel (e.g. line above and below is 0.5mm)
- read the value that lines up with the horizontal line on the thimble add this to the previous value
13
Q
reading of a vernier caliper
A
- read off the first two numbers e.g. 0.8 by looking at where the second scale begins
- third number is how many notches along until the two lines completely line up
14
Q
resolution of a vernier caliper
A
0.05mm
15
Q
resolution of a micrometer
A
0.01mm
