Identify the primary quantity from the following.

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Editor">Editor Staff asked 1 year ago

Identify the primary quantity from the following.
 
(a) Mass
 
(b) Density
 
(c) Speed
 
(d) Volume
 
This question was posed to me in a job interview.
 
This interesting question is from Dimensional Analysis and its Applications topic in section Units and Measurements of Physics – Class 11
Select the correct answer from above options 
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Editor">Editor Staff answered 1 year ago

Right answer is (a) Mass
 
For explanation I would say: Mass is one of the 7 primary quantities in the SI system. Density is dependent on mass and volume. Speed is dependent on length and time. And volume is dependent on length as its cube.

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