Mechanical Prop...

A spherical drop of water has 1$$\mathrm { mm }$$ radius. If the surfacetension of the water is $$50 \times 10 ^ { - 3 } \mathrm { N } / \mathrm { m }$$ , then the differenceof pressure between inside and outside the spherical dropis:

The residual pressure of a vessel at $${27}^{o}C$$ is $$1\times{10}^{-11}N/{m}^{2}$$. The number of molecules per cc in this vessel is nearly

Which of the following is NOT the characteristic of turbulent flow ?

Two identical holes of each of cross sectional area $$A$$ are opened on the opposite sides of a wide vertical vessel filled with water.The difference in vertical height of the two holes is $$h$$. The resultant force of reaction of water flowing out of vessel is-

A glass ball is dropped into a long cylinder full of water. The terminal velocity of the ball depends on 

The piston shown in the figure is moved downwards such that the vapour volume is decreased by 246.3cc. How many grams of $${ H }_{ 2 }O$$ is condensed? Assume aqueous tension at $$\quad { 27 }^{ 0 }C$$ is 360 mm Hg)

Two glass balls of radii r and 2r are dropped in air. The terminal velocity of the ball with radius r is 1 $$cms^{-1}$$.. That of the other will be 

A small spherical body of radius r is falling under gravity in a viscous medium and due to friction the medium gets heated. When body attains terminal velocity then rate of heating is proportional to.

Water flows through a pipe. The area of cross - section at one place $$A_1$$ = 10 $$cm^{2}$$, velocity of flow 1 m/s and pressure 2000 pa. At another place area $$A_2$$ = 5 $$cm^{2}$$. What is the pressure at area $$A_2$$ = 5 $$cm^2$$