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3 marksPhysical Quantities

CAPE Physics Unit 1 · 2008 · Paper 2 · Question 4(a)

A student is doing an experiment on the stretching of a thin wire (diameter less than 0.5 mm) and needs to measure its diameter.

Describe how the diameter of the wire could be measured accurately.

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Other parts of this question

  1. 4(b)Discuss, using examples, the difference between precision and accuracy in physical measurement.[4 marks]
  2. 4(c)Use this data to find the specific latent heat of the liquid, together with its uncertainty, and write the answer in the form L = (x ± y) x 10⁶ J kg⁻¹, using…[8 marks]

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