Question

is a quantity which has a unit, but no dimensions.​

Answer 1

Answer:

A rather trivial example of a quantity that has a unit but no dimension is a quantity of countable objects (in mathematics, it is called a “countable set”). Such quantity has no dimension — it's just a number — and it's unit is 1. On the other hand, in physics, there are no quantities that have a unit but no dimension.

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Explanation: