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Edexcel PHYSICS Doubts

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Saladin:
Hey, post all your physics doubts here!

I do Edexcel AS Physics!

7ooD:
how to calculate uncertanity of a given set of readings for example 14.2 14.7 and 15.1

break freak:
Find their Range/2 & their precision, compare & choose the larger value:
Range/2=(15.1-14.2)/2              Precision=0.1
           =0.45
Therefore, %uncertainty= 0.5 (to 1 decimal place)  ;D

break freak:
What is the answer for question 4 may 2009 Physics 3B with explanation plz ??? ??

7ooD:
how to get the Precision though??

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