A solid cylindrical needle of diameter d , length L , and densityρ n may fl oat in liquid of surface tension Y . Neglectbuoyancy and assume a contact angle of 0 ° . Derive a formulafor the maximum diameter d max able to fl oat in theliquid. Calculate d max for a steel needle (SG = 7.84) inwater at 20 ° C.

Compute the pressure @ point n ( P, ) as shown by the differential manometer in KPa if pressure @ point m ( Pm ) is equal 1027.66 mm Hg. air plpelne t. where: a = 12" b= 3.2 C= 4.0 d= 12 m mercury density (16 300 kgm") water pipeline

Q) A cylindrical capsule filled by liquid with SG = 2.5 is falling inside an inclined pipe with e =19 °, as depicted in the figure. The small space between the capsule and the pipe is lubricated with an oil film that has viscosity (u =2.5 x 10-3Pa.s). Find the steady rate of descent of a capsule with diameter d = 70 mm, and length /= 120 mm sliding inside a vertical smooth pipe that has inside diameter D Pipe = 74 mm. Assume Oil film that the capsule is concentric with the pipe as it falls. Capsule

Fluid mechanics solve it correctly