Mechanics | Relativity Answers

Air streams horizontally past an air plane .The speed over the top surface is 60 m/s and that under the bottom surface is 45 m/s .the density of air is 1.293 kg /m cube .then he diference in pressure is ????????????????????????????????????

A rectangular vessel when full of water takes 10 minute to be empties through an orifice in the bottom .how much time will it take to be emptied when half filledf with water ??????????????????????

Two equal drops are falling through air with a steady velocity of 5cm/s .if two drops coalece, then new terminal velocity will be ?????????????????????????????

if the excess pressure inside a soap bubble is balanced by an oil column of 2mm ,then the surface tension of soap solutition will be (r=1cm ,density of oil= 0.8 g/cm cube )

There is small hole in a hollow sphere .the water enters in it when it is taken to depth of 40 cm under water .the surface tension of water is 0.07 N/m .the diamerter of hole is ?????????????????????

if the excess pressure inside a soup bubble is balanced by an oil column of hegiht 2mm ,then surface tension of soap wiill bw r=1cm .density of oil =0.8 g/cm cube )

A glass capillary tube of inner diameter 0.28 mm is lowered vertically into water in a vessel .the pressure to be applied on the water in the capillary tube so that water level in the tube is same as that in vessel is (surface tension of water =0.07 N/m and atomspheric pressure = 10 raise to power 5 )???????????????????????????????

The excess pressure inside a spherical drop of water is four times that of another drop .the their respective mass ratio is ??????????????????????????

A vertical U tube of uniform cross-section contains water in both the arms .A 10cm glycerine column (R.D=1.2)is added to one of the limbs .the level difference b/w the two free surface in the two limbs will be ????????????????????????????????????????

A piece of gold weigh 10g in air and 9g in water .what is volume of cavity (19.3 g/cm cube )