Answer: 4.8 g/cm³.
- A 4.783 g/cm³
- B 4.8 g/cm³
- C 4.78 g/cm³
- D 5.0 g/cm³
Correct answer: B. 4.8 g/cm³
Explanation: 5.74/1.2 = 4.783..., but the least precise value (1.2) has 2 significant figures, so density = 4.8 g/cm³.
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.