A2 Physics ISA soon

jewii

jewii

jewii

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Joined
12 Jul 2010
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334
i got an A2 isa soon. i just want to clear up some things on uncertency

ok lets say we measured something and it's 5.0(X) and the precision was +/- 0.1

the percentage uncertency = 2% and if we times or devide X the percentage uncertency is constant right? but if we apply a power to X, we times the % uncertency by the power. i.e. X^3 is 6% uncertain.

so what happens when we apply functions? for example

ln(X) or tan(X) dooes the percentage uncertency stay constant so we just find the uncertency value by ln(X) * 0.02 = +/- 0.02ln(X)

so is this all correct exspecially the function part?
 
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nah SHM, it's a lot worse than capacitors, you have to count the number of ossiclations in a period of time, it's damn hard when it's at a high frequency and low amplitude, and just ot make it even harder, it vibrated near the natural frequency making the amplitude keep going big and small again :@ made me so dizzy at the end, really bad :(



for all your cool guys above, it means simple harmonic motion not singularity homing monster. (top of my head)
 
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