Two capillary tubes AB and BC are joined end to end at B, AB is 16cm long and of diameter 4mm whereas BC is 4cm long and of diameter 2mm. The composite tube is held horizontally with A connected to a vessel of water giving a constant head of 3cm and C is openn to the air. Calculate the pressure difference between B and C.

A 10.0 cm column of air is trapped by a column of Hg 4.00 cm long in capillary tube of uniform bore when the tube is held horizontally in a room at 1 atm. Length of the air column when the tube is held vertically with the open end up is

Two capillary tubes of diameters 1 mm and 2 mm are dipped in water . The rise in water level in 1 mm tube is 1.4 cm . The rise in another tube will be

Two tuning forks A and B give 18 beats "in" 2 s . A resonates with one end closed air column of 15 cm long and B with both ends open column of 30.5 long. Calculate their frequencies.

Water flows through a capillary tube of radius r and length at a rate of 40 ml per second, when connected to a pressure difference of h cm of water. Another tube of the3 some length but radius. (r)/(2) is connected in series with this tube and the combination is connected to the same pressure head.[density of water is rho ]

A horizontal thin tube of length 2L completely filled with a liquid of density delta rotates about a vertical axis passing through one of its end and along the diameter of its side face with an constant angular velocity omega . Two vertical thin long tubes are fitted with the horizontal tube to measure the pressure difference between points A and B which are at same horizontal level as shown. Neglect viscous forces and surfaces tension of liquid. The difference in the heights (h) of the liquid column in the two vertical thin tubes is :

Two spherical soap bubbles of diameters 10 cm and 6 cm are formed, one at each end of a narrow horizontal glass tube. If the surface tension of the soap solution is 0.03 Nm^(-1) , then the pressure difference in pascal between the two ends of the tube is

Two tuning fork A and B give 5 beats // sec. A resounds with a closed column of air 15 cm long and B with an open column of air 30.5 cm long. Calculate their frequecies. Neglect end correction.