_ The thickness of thermal and hydrodynamic boundary layer is equal if

1.	_ The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is$?
A.	Equal to one
B.	Greater than one
C.	Less than one
D.	Equal to Nusselt number
Answer» B. Greater than one

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_ The thickness of thermal and hydrodynamic boundary layer is equal if Prandtl number is$?

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