# How to write uncertainities on different measurement

I need some advice on how to write uncertainities on different measurements.
I need this urgently.
Thanks

Related Other Physics Topics News on Phys.org

with a delta $$x \pm \Delta x$$

i mean on measurements

$$x = (3.01 \pm 0.01) \text{ cm}$$

You mean like that? Otherwise, your question is so vague and general, I have no idea what you want.

$$x = (3.01 \pm 0.01) \text{ cm}$$

You mean like that? Otherwise, your question is so vague and general, I have no idea what you want.

That is it exactly what I want.

You simply write down the result of your measurement, and then you decide what the uncertainty is. You round the uncertainty to one significant digit (0.0193 becomes 0.02) and you round the measurement result to the same amount of digits (as long as they are in the same units). You then write it down as
$$y = (x \pm \Delta x) \text{ [unit]}$$
where x is the measurement result and delta x the uncertainty.

Well my question was about the measurements in a ruler in mm and a protractor.
I guess it would be +/-1 degree and +/- 0.5mm.