- #1

LCSphysicist

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- 162

- Homework Statement
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- Relevant Equations
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I am having a little trouble to write in the right way a number:

I did a calc in which the uncertainty was 150, while the value with physics meaning was about to 1427.

I am trying to figure out what is the right way to write it.

Now, since the uncertainty can not have more than two significant figure, my guess would be:

$$1.4*10^3 \pm 1.5*10^2$$

My doubt is about the first number, what are the rules about it? The same number of significant figures that uncertainty has? But normally if the uncertainty is, let's say, "0.003" and the value measured "154.3464". I would write $$154.346 \pm 0.003$$ and i am almost sure this is right, but it does not have the same quantity of significant figures. I am confused

I did a calc in which the uncertainty was 150, while the value with physics meaning was about to 1427.

I am trying to figure out what is the right way to write it.

Now, since the uncertainty can not have more than two significant figure, my guess would be:

$$1.4*10^3 \pm 1.5*10^2$$

My doubt is about the first number, what are the rules about it? The same number of significant figures that uncertainty has? But normally if the uncertainty is, let's say, "0.003" and the value measured "154.3464". I would write $$154.346 \pm 0.003$$ and i am almost sure this is right, but it does not have the same quantity of significant figures. I am confused