GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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SI base units for length and mass are
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centimeter
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meter and gram
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centimeter and kilogram
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meter and kilogram
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Explanation:
Detailed explanation-1: -The meter, symbol m, is the SI unit of length. It is defined by taking the fixed numerical value of the speed of light in vacuum c to be 299 792 458 when expressed in the unit m s-1, where the second is defined in terms of Cs. The kilogram, symbol kg, is the SI unit of mass.
Detailed explanation-2: -The SI unit of mass is the kilogram (kg).
Detailed explanation-3: -The kilogram is the base unit of mass because electrical engineers in the late 19th century chose a particular set of practical electrical units. Their practical units were a success, and we are still using them today: ohm, volt, and ampere.
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