Answer: 3.
- A 1
- B 2
- C 3
- D 5
Correct answer: C. 3
Explanation: In scientific notation, all digits in the coefficient are significant. 3.50 has 3 significant figures (3, 5, and the trailing 0 after the decimal point).
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.