The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly:

The temperature at which the molar specific volumes for liquid and vapor phases become equal is termed as:

A liquid drop acquires spherical shape due to:

​The diameter of a capillary is 4mm. If Reynolds's number of the tube is 1000 and the co-efficient of viscosity for the water is 0.02 poise, determine the maximum speed of water for the stream line flow in the tube?​

The coefficient of volume expansion of glycerine is $$49×10^{-5}\text{K}^{-1}$$​. Find the fractional change in its density for a 20° C rise in temperature?

Water flows in a horizontal pipe of non-uniform area of cross-section at a pressure difference of 1.6 cm of mercury. If the velocity of water at the larger cross-section of pipe is 50 cm/s, find the velocity of water at the other end?

What is the largest average velocity of blood flow in an artery of radius $$4×10^{-3}$$​ m if the flow must remain laminar? Also determine the corresponding flow rate?

(Consider viscosity of blood to be $$2.084×10^{-3}$$​ pa s.)

A tank with a square base of area 1.0 $$\text{m}^2$$​ is divided by a vertical partition in the middle. The bottom of the partition has a small-hinged door of area 10 $$\text{cm}^2$$​. The tank is filled with water in one compartment, and an acid (of relative density 1.7) in the other, both to a height 3.0 m. Calculate the force necessary to keep the door close?

At what depth from surface of water, the pressure will be equal to three times the atmosphere pressure? Given atmospheric pressure = 10 $$\text{N/cm}^2$$​ and g = 9.8 $$\text{m/s}^2$$​.