Answer: 8 new units.
- A 16 new units
- B 32 new units
- C 8 new units
- D 4 new units
Correct answer: C. 8 new units
Explanation: Energy has dimensions [ML²T⁻²], so n2 = n1 × (M1/M2)(L1/L2)²(T1/T2)⁻² = 16 × (1/2) × (1/2)² × (2/1)² = 16 × 0.5 × 0.25 × 4 = 8 new units.
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.