Uncertainty Principles

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Tony Ong 3K
Posts: 63
Joined: Fri Sep 28, 2018 12:23 am

Uncertainty Principles

Postby Tony Ong 3K » Sat Nov 03, 2018 10:45 pm

For uncertainty of velocity, if they give you that the speed is 373.23 plus or minus .34 m/s, is the uncertainty in velocity 373.23 or .34 or how do you calculate it??

AhYeon_Kwon_2H
Posts: 48
Joined: Fri Sep 28, 2018 12:27 am

Re: Uncertainty Principles

Postby AhYeon_Kwon_2H » Sat Nov 03, 2018 10:53 pm

Think of uncertainty like a range: if the velocity given is 373.23 plus or minus .34 m/s, the velocity will be something between 372.89 m/s and 373.57 m/s. We know it must fall between these two values but we're not sure what the exact velocity will be, so the uncertainty is 373.57-372.89 = 0.68.

Long story short, double whatever value is after the "plus or minus" to get the uncertainty. (0.34*2 = 0.68)

sameeksha_panda_3h
Posts: 31
Joined: Fri Sep 28, 2018 12:25 am

Re: Uncertainty Principles

Postby sameeksha_panda_3h » Sat Nov 03, 2018 11:42 pm

Yeah pretty much for uncertainty, if you get a "plus or minus" some value, double it, otherwise if you're told within a certain percentage, multiply by that percentage to get y=the uncertainty.


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