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Question
Which of the following sets cannot enter into the list of fundamental quantities in any system of units?
Options
length, mass and velocity,
length, time and velocity,
mass, time and velocity,
length, time and mass.
Solution
length, time and velocity
We define length and time separately, as it is not possible to define velocity without using these quantities. This means that one fundamental quantity depends on the other. So, these quantities cannot be listed as fundamental quantities in any system of units.
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