The reynolds number is a dimensionless quantity used in fluid mechanics. it is defined as: where d is the pipe diameter, v is the fluid velocity, is the fluid density, and is the fluid viscosity. in american engineering units (ft, sec, lbm), what are the units of the viscosity? hint, all the units should cancel out to produce the dimensionless reynolds number.

Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2

The characteristic roots of a dynamic system are: 1.7920 1.8160 i, -1.7920 1.8160 i, -0.4160 what is the order of this system? what are the settling time and damping ratio of the system?

Apressure vessel with an r/t 20 cannot be treated as thin walled vessel. a)-trune b)- false