ANSWER ONLY IF YOU ARE SURE

A dimensionless combination of variables that is impor-

tant in the study of viscous flow through pipes is called the Reynolds

number, Re, defined as VD/ where, as shown in figure below

is fluid density, V the mean fluid velocity, D the pipe diameter, and

the fluid viscosity. A Newtonian fluid having a viscosity of 0.35 N .s / m^2

and a specific gravity of 0.91 flows through a 25-mm-

diameter pipe with a velocity of 2.8 m/s

Determine the value of the Reynolds number using

SI units .

See figure below .

D