Mechanical Prop...

Some amount of water is poured on top face of a horizontal glass place. Excess amount of water spills over the edge a little amount of water there in a thin uniform layer a portion of which is shown in the figure. Surface tension of water is $$\sigma $$ the vertical thickness of the water layer far away the edge is t, the point in the plane on the diagram on the liquid where the liquid protrudes the most is D. The vertical depth of this point from the horizontal free surface of the water layer is d, p is density of water and g is acceleration due to gravity. Mark the correct relation(s)

Air is streaming past a horizontal air plane wing such that its speed in 120 m/s over the upper surface and 90 m/s at the lower surface. If the density of air is 1.3 kg per $$metre^3$$ and the wing is 1o m long and has an average width of 2m , then the difference of the pressure on the two sides of the wing of

The apparent depth of water in a cylindrical water tank of diameter $$2R$$ cm is reducing at the rate of $$x$$ cm/min when water is being drained out at a constant rate. The amount of water drained in $$cc/minute$$ is: ($${n_1}$$ = refractive index of air, $${n_2}$$ = refractive index of water)

What principle law explains the working of the hydraulic brakes in automobiles?

A cylindrical tank$$ I m$$ in radius rests on a platform$$ S m$$ high water,initially the tank is filled with water upto a height of $$ S m$$. A v.mg whose area is $$ 10 ^ { 4 } m ^ { 2 }$$is removed from an office on the side of the tank at the bottom .Calculate

Find the depression of the meniscus in the capillary tube of diameter $$0.4\ mm$$, dipped in a beaker containing mercury. (Density of mercury $$=13.6\times 10^{3}\ kg/m^{3}$$) ; surface tension of the mercury is $$0.49\ N/m$$ ; angle of contact is $$135^{o}$$ ).

The velocity of efflux of a liquid through an orifice in the bottom of a tank does not depend upon 

A large tank filled with water has two holes in the bottom, one with twice the radius of the other. In steady flow the speed of water leaving the larger hole is______ the speed of the water leaving the smaller.

Water flows through a horizontal tube as shown in figure. If the difference of heights of water column in the vertical tubes in $$2\ cm,$$  and the areas of cross-section at $$A$$ and $$B$$  are $$4 \mathrm\ { cm } ^ { 2 }$$ and  $$2 \mathrm\ { cm } ^ { 2 }$$ respectively, find the rate of flow of water across any action

Consider two shoulder bags, one with a thin strap, and the other with a wide strap. If both the bags are equally heavy, the bag with the wide strap will be more comfortable to carry because