A liquid of density 1000 kg m⁻³ and viscosity η = 0.1 N s m⁻² flows downward in a vertical pipe. A small sphere of density 100 kg m⁻³ and radius 5 cm remains at rest if the liquid speed is 10k m s⁻¹. Find k.
A liquid of density 1000 kg m⁻³ and viscosity η = 0.1 N s m⁻² flows downward in a vertical pipe. A small sphere of density 100 kg m⁻³ and radius 5 cm remains at rest if the liquid speed is 10k m s⁻¹. Find k.