For flow in a pipe, the Reynolds number is defined as Re=(VpD)/mu))
Where V is velocity, is density, is viscosity, and D is diameter. Expressed this way, the Reynolds number can be interpreted as

the ratio of viscous to inertial forces.
the ratio of inertial to viscous forces.
the ratio of momentum flux to viscous forces.
the ratio of kinetic energy to viscous forces.

Reynolds number = the ratio of inertial to viscous forces

Explanation:

Reynolds number is defined as :

Where

is flow speed

D is diameter of the tube

is  kinematic viscosity of the fluid

compass can be used day and night, cloudy or sunny

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it