- #1
adityax26
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Homework Statement
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So basically I am calculating the terminal velocity for a small sphere falling in a measuring cylinder filled with glycerine. The distance traveled is 20 cm (0.20 m), and I have conducted 3 trials for each temperature.
I have measured the displacement of the ball using a smartphone camera with 960 FPS, which gives me a absolute uncertainty of 1/960 = (approximately) ± 0.01 s for time.
Now I am wondering, how do I find the uncertainty in the AVERAGE time of 3 trials at any temperature? Does the absolute uncertainty stay at ± 0.01 s for the average? Do I look at the range? Again; I measured time using a smartphone capturing at 960 FPS.
Homework Equations
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Uncertainty propagation: relative/percentage uncertainty..?
The Attempt at a Solution
Using the same absolute uncertainty for each trial, I could use ± 0.01 s as uncertainty for time.
However, looking at the range, all of my temperatures have a range of around ± 0.06 s (minimum and maximum times differ by around this much for every temperature). Should I use this as my uncertainty?
Thanks!