A water drop falls in air with a uniform velocity. Find the difference between the curvature radii of the drop's surface at the upper and lower points of the drop separated by the distance `h = 2.3 mm`.

Two water drops of the same radius are falling through air with a velocity 5cm/s. If the two drops coalesce to form one drop, the terminal velocity of the drop will be

Eight equal water drops are falling in air with a steady velocity 4cms^(-1) ​. If the drops coalesced what will be the new velocity :-

Water drops fall at regular intervals from a roof. At an instant when a drop is about to leave the roof, the separations between 3 successive drops below the roof are in the ratio

A spherical drop of water has 1 mm radiusHf the surface tension of water is 75 xx 10^(-3) N/m, then difference of pressure between inside and outside of the drop is

A spherical drop of water has 1 mm radiusHf the surface tension of water is 75 xx 10^(-3) N/m, then difference of pressure between inside and outside of the drop is

In a Millikan-type oil-drop experiment, the plates are 8 mm apart. An oil drop is found to remain at rest when the upper plate is at a potential 135 V higher than that of the lower one. When the electric field is switched off, the drop is found to fall a distance of 2.0 mm in 36 seconds with a uniform speed. Find (a) the charge on the drop and (b) the number of electrons attached to this drop. Density of oil = 880 kg m^(-3) and coefficient of viscosity of air = 180 mupoise .

In a Millikan-type oil-drop experiment, the plates are 8 mm apart. An oil drop is found to remain at rest when the upper plate is at a potential 136 V higher than that of the lower one. When the electric field is switched off, the drop is found to fall a distance of 2.0 mm in 36 seconds with a uniform speed. Find (a) the charge on the drop and (b) the number of electrons attached to this drop. Density of oil = 880 kg m^(-3) and coefficient of viscosity of air = 180 mupoise .