The number L = 8.0 x 10^4 cm can be expressed as:
Correct answer: B. L = 0.8 km
- A. L = 8.0 x 10^6 mm
- B. L = 0.8 km
- C. L = 0.8 x 10^2 m
- D. L = 8.0 x 10^3 m
Explanation
B is the answer as converting 80000 cm to meters would give us 800 m as we divide 80000 cm by 100 cm/m. Converting meters to kilometers, we must divide 800 m by 1000 m/km to get 0.8 km
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About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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