1.

Give an example of(a) A physical quantity which has a unit but no dimensions. (b) A physical quantity which has neither unit nor dimensions. (c) A constant which has a unit. (d) A constant which has no unit.

Answer»

(a) Angle or solid angle. 

(b) Relative density, etc. 

(c) Planck’s constant, universal gravitational constant, etc. 

(d) Reynold’s number.



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