Qualification > Sciences
AS Phys Prac Errors & Improvements
Deadly_king:
--- Quote from: Ari Ben Canaan on October 24, 2010, 03:05:12 pm ---Repeat the experiment ?
When measuring things use a measuring apparatus with a lower uncertainty.
--- End quote ---
Indeed lower uncertainty is a good point, but usually you don't get sophisticated apparatus in a lab. So you could just change the words but still use the same reasoning.
Example : If you're measuring the period of oscillation. Instead of saying, use a stopwatch with lower uncertainty(which is not very likely to be available), you could say, measure for a longer time,i.e larger number of oscillations.
Hence an increase in the time would reduce uncertainty ;)
Chingoo:
A tip to remember is that accuracy depends upon systematic error while precision depends upon random error. Furthermore, systematic error has a constant sign and magnitude and random error has a varying sign and magnitude. When you're asked in the examination to pick out the errors and then provide symmetric improvements, keep in mind which factor is variable and why. This is your random error. DO NOT ever assume a systematic error, because that way you're either implying that you're too big a goof to work a way around the systematic error. Quantities like reaction time, temperature (was the AC on when the practical started, but not later? This is reported by the center so use it to your advantage, but try to remain focused), distance, measurement of extreme position (parallax error?), etc. Good luck!
Deadly_king:
--- Quote from: Chingoo on October 25, 2010, 02:48:22 pm ---A tip to remember is that accuracy depends upon systematic error while precision depends upon random error. Furthermore, systematic error has a constant sign and magnitude and random error has a varying sign and magnitude. When you're asked in the examination to pick out the errors and then provide symmetric improvements, keep in mind which factor is variable and why. This is your random error. DO NOT ever assume a systematic error, because that way you're either implying that you're too big a goof to work a way around the systematic error. Quantities like reaction time, temperature (was the AC on when the practical started, but not later? This is reported by the center so use it to your advantage, but try to remain focused), distance, measurement of extreme position (parallax error?), etc. Good luck!
--- End quote ---
Hehe.......thanks for the advice dear :D
+rep
lana:
has anyone done the paper yet ??
elemis:
--- Quote from: lana on October 26, 2010, 02:49:07 pm ---has anyone done the paper yet ??
--- End quote ---
Yeah.
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