Answer: 7.
- A 7
- B 5
- C 3
- D 9
Correct answer: A. 7
Explanation: There are seven SI base quantities: length, mass, time, current, temperature, amount and luminous intensity.
The 7 SI base units. All derived units (newton, joule, watt, volt, etc.) can be expressed as combinations of these 7 fundamental units raised to various powers.
Concept context
SI base units, dimensional analysis, significant figures, and error propagation. The toolkit every physics calculation relies on.