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# AS PHYSICS H/W Measurment Basics.

1. A Length measured with a standard ruler is exactly 10cm. Record this correctly.
2. (Original post by TheManHimeself)
A Length measured with a standard ruler is exactly 10cm. Record this correctly.
Are you talking about uncertaintyy?. Then I think you would write it with the uncertainty of the 0 placement and where you take the measurement. A normal ruler measures in mm so the uncertainty in your measurements is 0.5mm at 0 and the same where you measure. 0.5 +0.5 = 1mm

Therefore you write ( 100mm +- 1mm ).
3. (Original post by leopard923)
Are you talking about uncertaintyy?. Then I think you would write it with the uncertainty of the 0 placement and where you take the measurement. A normal ruler measures in mm so the uncertainty in your measurements is 0.5mm at 0 and the same where you measure. 0.5 +0.5 = 1mm

Therefore you write ( 100mm +- 1mm ).
Yh it is about uncertainty thanks .

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