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# Physics practical simple question

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1. Hi, I'm self-teaching physics AS and A2 and have my practicals in a few days.

Having studied the subject only at home I have had no lab time and also no input from teachers on the expected format to write any measurements.

I understand that any measurement would have an uncertainty and I am quite comfortable with manipulating these when combining measurements, but is it expected that all measurements taken in the exam have an uncertainty written with them?

I would have guessed that it is expected but when reading through the examiner reports and mark schemes I see no reference at all to this; Other than for example "all x to the nearest mm".

Does this mean they are expecting to see something like 23 mm (instead of 23.4 mm), or 23 +/- 1 mm ?

In question (1)(a)(iv) of this paper (mark scheme) as an example, would each measurement of 'x' in the table be written as 23 mm (instead of 23.4 mm), or 23 +/- 1 mm ?

Thanks.

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