Aslider of mass 0.25 kg on a string, 0.5 m long is rotating around a pivot on a frictionless table. the velocity of the slider is initially 0.05 m/s. when the string is pulled into a radius of 0.125 m how fast is the mass spinning?

Hydraulic fluid with a sg. of 0.78 is flowing through a 1.5 in. i.d. pipe at 58 gal/min. the fluid has an absolute viscosity of 11.8 x 105 lbf-sec/ft2. is the flow laminar, turbulent or within the critical range? give both a numerical reynolds number and a term answer.