Q.1-Base quantities, symbols and SI units

Use the syllabus conventions for base quantities and common physical quantities, including usual symbols and units for mechanics, waves, electricity, fields, thermal physics, quantum/nuclear physics, medical physics and astronomy.

Use q.1-base quantities, symbols and si units to connect the rule to the data and decision in the question.

This matters because q.1-base quantities, symbols and si units determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply q.1-base quantities, symbols and si units to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: Q.1-Base quantities, symbols and SI units is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.