Answer: Radian.
- A Newton
- B Radian
- C Pascal
- D Watt
Correct answer: B. Radian
Explanation: The radian, used to measure plane angle, is dimensionless because it is defined as a ratio of two lengths (arc length / radius).
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.