What is term S in the formula for Return Loss for tubes in a Shell and – McqOptions

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1.	What is term S in the formula for Return Loss for tubes in a Shell and Tube Heat Exchanger? H = ( frac{4N}{S} frac{V^2}{2g} ).
A.	Specific gravity
B.	Density
C.	Specific heat capacity
D.	Specific heat
Answer» B. Density

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