Answer: 10⁻³⁰ kg.
- A 10⁻³¹ kg
- B 10⁻³⁰ kg
- C 10⁻²⁹ kg
- D 10⁻²⁸ kg
Correct answer: B. 10⁻³⁰ kg
Explanation: Since 9.1 rounds up past the midpoint, the order of magnitude is taken as the next power of ten, giving 10⁻³⁰ kg.
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.