When to multiply by 2
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When to multiply by 2
When do we multiply the uncertainty in p or x or v by 2? I'm getting confused when doing calculations.
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Re: When to multiply by 2
Do you mean like if the value is given like "the velocity is 10 +- 1 m/s"? in this case, the indeterminacy in velocity is 2, as the velocity could be between 9 and 11. So you would take the +-1 * 2.
If it says "the indeterminacy is (delta)2", then you can take that as is
If it says "the indeterminacy is (delta)2", then you can take that as is
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Re: When to multiply by 2
If you are referring to a question like on test 2 #2. You multiply momentum by a certain factor, ex) 2. when the problem says "The uncertainty in the momentum of a ball is 2 times its momentum" In that sort of example you would calculate the momentum, then multiply that value by 2 to get the uncertainty in momentum
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Re: When to multiply by 2
You would multiply by 2 when you're given something like +/-0.5 as your value. This uses the same reasoning as the first answer on this post, the two outermost values we can get are .5 and -.5, so when you subtract them (.5--.5) you get 1, the same thing as multiplying .5 times 2.
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Re: When to multiply by 2
Would we still multiply it by 2 if we are just given the velocity like 10 m/s?
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Re: When to multiply by 2
No, if you're just given the velocity you would use that value given. You'd only multiply by 2 if given a range as stated before, like a velocity +/- .35 (for example), as that the .35 dictates the uncertainty and must multiply by 2 to account for the +/- range of it.
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