Which quantity signifies the ratio of temperature gradient at the surface to a reference temperature gradient?

Which quantity signifies the ratio of temperature gradient at the surf

1.	Which quantity signifies the ratio of temperature gradient at the surface to a reference temperature gradient?
A.	Reynolds number
B.	Nusselt number
C.	Fourier number
D.	Stanton number
Answer» C. Fourier number

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Which quantity signifies the ratio of temperature gradient at the surface to a reference temperature gradient?

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