Back to the full dot-point answer
SingaporePhysicsQuick questions
Measurement and Kinematics
Quick questions on Physical quantities and SI units explained: O-Level Physics
5short 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 standard prefixes?Show answer
Prefixes let you write large and small quantities neatly without long strings of zeros.
What is standard form?Show answer
Standard form writes a number as a value between and multiplied by a power of ten. It keeps very large and very small numbers readable and makes the prefix obvious:
What is q1?Show answer
State the SI base unit, with symbol, for length, mass, and time. [2 marks]
What is q2?Show answer
Convert into metres and write the answer in standard form. [2 marks]
What is q3?Show answer
Explain why velocity is a vector but speed is a scalar. [2 marks]
Have a question we have not covered?
This dot-point answer is short enough that we have not extracted many short questions yet. Read the full dot-point answer or ask Mo, our study assistant, in the chat for follow ups.