What should be the average velocity of water in a tube of diameter 2 cm so that the flow is laminar? The viscosity of water is 0.001 pa-s.

Water is flowing through a horizontal tube of unequal cross section . At a point where the velocity of water is 0.4 m. s^-1 , the pressure is 0.1 m Hg. What is the pressure at a point where the velocity of water is 0.8 m. s^-1 ? The density of mercury =13.6xx10^3kg. m^-3 .

What will be the approximate terminal velocity of a rain drop of diameter 1.8xx10^-3 m , when density of rain water ~~10^3 kg. m^-3 and the coefficient of viscosity of air ~~1.8xx10^-5 N.s. m^-2 ?(Neglect buoyancy of air)

Water is flowing through a very narrow tube. The velocity of water below which the flow remains a streamline flow is known as

What should be the minimum area of an ice block of thickness 30 cm so that it can float on water with a man of mass 90 kg on it? The density of ice = 0.9g*cm^(-3) .

What will be th approximate terminal velocity of a rain drop of diameter 1.8xx10^(-3)m . When density of rain water ~~10^(3) kgm^(-3) and the co-efficient of viscosity of air ~~1.8xx10^(-5) Nsm^(-2) ? (Neglect buoyacy of air)