A large bottle is fitted with a siphon made of capillary glass tubing. Compare the times taken to empty the bottle when it is filled. (i) with water (ii) with petrol of density 0.8 cgs units. The viscosity of water and petrol are 0.1 and 0.2 cgs units repectively.

A vessel of cross-section 20xx10^(-4) square metres has a capillary tube of length 10 cm and internal radius 0.5 mm at the bottom. It is initially filled with water to a height of 20 cm above the capillary tube. Find the time taken by the vessel to expt one-half of its contents, given that the viscosity of water of 0.001 SI units. Density of water = 1000 kg per cubic metre. [Hint : See example 5]

Find the nature of flow of water flowing at a speed of 8 cms"^(-1) through a horizontal tube of radius 2 cm. The viscosity of water at room temperature is 0.01 Poise.

A cylindrical vessel of radius 3 cm has at the bottom a horizontal capallary tube of length 20 cm and intrnal radius 0.4 mm. If the vessel is filled with water, find the time taken by it to empty one half of its contents. Given that the viscosity of water is 0.01 poise.

The mass of an empty 40 litre petrol tank of a vehicle is 8.0 kg What will be its mass when filled completely with a fuel of density 700(kg)/(m^3) .

Calculate the average velocity of water in a tube of diameter 0.3 m so that the flow is (i) laminar (ii) turbulent. The viscosity of water is 10^(-3)" Nm"^(-2)s .

A glass rod of diameter d_1 =1.5 mm is inserted symmetrically into a glass capillary with inside diameter d_2=2 mm . Then the whole arrangement is vertically oriented and broght in contact with the surface of water . Surface tension and density of water are 0.075 N//m and 10^3 kg//m^3 respectively . the height throgh which the water will rise in the capillary is (g=10 m//s^2)

A vessel fitted with a horizontal capillary tube near its bottom is alternately filled with two liquids of specific gravity 0.8 and 0.9 . It empties itself in 40 and 30 minutes respectively. Calculate the ratio of their coefficient of viscosity.

Water rises in a capillary tube of diameter 0.2xx10^(2)m upto a height of 1.5 cm. The surface tension of water is-