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EnglandPhysicsQuick questions
3.1 Measurements and their errors
Quick questions on Estimation of physical quantities: orders of magnitude and Fermi reasoning - AQA A-Level Physics
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What are not stating assumptions?Show answer
Exam questions on estimation usually award marks for the assumptions made, not just the final number.
What is q1?Show answer
State the order of magnitude of the ratio of the size of an atom to the size of its nucleus. [1 mark]
What is q2?Show answer
Estimate the number of grains of sand that would fill a one-litre bottle, stating your assumptions. [3 marks]
What is q3?Show answer
State the order of magnitude of atmospheric pressure in pascals. [1 mark]
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