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Measurement
Quick questions on SI base quantities and units explained: H2 Physics Measurement
6short 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 the seven base quantities?Show answer
Every physical quantity in the syllabus is built from seven base quantities, each with one SI base unit.
What are derived units from base units?Show answer
A derived unit is any combination of base units. You build it by substituting the defining equation of the quantity.
What are homogeneity of equations?Show answer
An equation is homogeneous (dimensionally consistent) if every additive term has the same base units. To test it:
What is q1?Show answer
State the seven SI base quantities and their units. [3 marks]
What is q2?Show answer
Express the joule and the watt in SI base units. [2 marks]
What is q3?Show answer
The power radiated by a black body is modelled as , where is area and is temperature. Determine the base units of the constant . [3 marks]
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