Which of the following is the correct pair of a physical quantity and its SI unit?
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A.
Force - dyne
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B.
Power - kilowatt
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C.
Pressure - Pascal
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D.
Energy - ergs
Correct Answer:
C. Pressure - Pascal
Explanation:
The correct pair is Pressure - Pascal. In the International System of Units (SI), the Pascal (Pa) is the standard unit for measuring pressure, defined as one newton per square meter. While the other options represent valid physical quantities, their paired units do not belong to the SI system. Dyne and ergs are units from the centimeter-gram-second (CGS) system used for force and energy, respectively, rather than the SI units of Newtons and Joules. Additionally, the kilowatt is a multiple of the SI unit for power (the watt), but it is not the base or standard derived SI unit itself. Therefore, Pressure - Pascal is the only accurately matched pair according to standard SI conventions.
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