Euler’s dimensionless number relates the following__________________?

A. 0.423 D
B. 0.577 D
C. 0.223 D
D. 0.707 D
where D is the depth of flow

A. the meta-center should lie above the center of gravity
B. the center of buoyancy and the center of gravity must lie on the same vertical line
C. a righting couple should be formed
D. all the above are correct
E. none of the above is correct

A. it is incompressible
B. it has uniform viscosity
C. it has zero viscosity
D. it is frictionless
E. it is at rest