Which one is a unit of time:
Correct answer: B. Half Year
- A. Micro
- B. Half Year
- C. Angstrom
- D. Light Year
Explanation
"Half Year" is a unit of time, but it is not a standard unit in the SI system. It is a non-SI unit representing a period of six months or half of a year. While it is used in everyday language, it is not part of the standard set of units.
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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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