A thin plate `AB` of large area `A` is placed symmetrically in a small gap of height `h` filled with water of viscosity `eta_(0)`and the plate has a constant velocity `v` by applying a force `F` as shown in the figure. If the gap is filled with some other liquid of viscosity `0.75 eta_(0)` at what minimum distance (in cm) from top wall should the plate be placed in the gap, so that the plate can again be pulled at the same constant velocity `V`. by applying the same force `F`? (Take `h=20 cm`)

A thin plate of large area is placed midway in a gap of height h filled with oil of viscosity and the plate is pulled at constant velocity v by applying the same drag force on the plate. If a lighter oil of viscosity eta is then substituted in the gap. it is found that for the velocity v , and the same drag force as previous case the plate is located unsymmetrically in the gap but parallel to the walls. Find eta in terms of distance from nearer wall to the plane y .

A thin plate of large area is placed midway in a gap of height h filled with oil of viscosity and the plate is pulled at constant velocity v by applying the same drag force on the plate. If a lighter oil of viscosity eta is then substituted in the gap. it is found that for the velocity v , and the same drag force as previous case the plate is located unsymmetrically in the gap but parallel to the walls. Find eta in terms of distance from nearer wall to the plane y .

A drop of water of radius r is falling rhough the air of coefficient of viscosity eta with a constant velocity of v the resultant force on the drop is

A square plate of 0.1 m side moves parallel to another plate with a velocity of 0.1 ms^(-1) both plates immersed in water. If the viscous force is 0.02 N and the coefficient of viscosity 0.01 poise, what is the distance apart?

A thin horizontal movable plate P is separated from two fixed horizontal plates P_1 and P_2 by two highly viscous liquids of coefficient of viscosity eta_(1) and eta_(2) as shown, where eta_2 = 4eta_(1) . Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is h, then the distance h1 of movable plate from upper fixed plate such that the movable plate can be moved with a constant velocity by applying a minimum constant horizontal force F on movable plate is (assume velocity gradient to be uniform in each liquid).

A thin horizontal movable plate P is separated from two fixed horizontal plates P_1 and P_2 by two highly viscous liquids of coefficient of viscosity eta_(1) and eta_(2) as shown, where eta_2 = 4eta_(1) . Area of contact of movable plate with each fluid is same. If the distance between two fixed plates is h, then the distance h1 of movable plate from upper fixed plate such that the movable plate can be moved with a constant velocity by applying a minimum constant horizontal force F on movable plate is (assume velocity gradient to be uniform in each liquid).

A squre metal plate of 10cm side moves parallel to another plate with a velocity of 10cm s^(-1), both plates immersed in water. If the viscous force is 200 dyne and viscosity of water is 0.01 poise, what is their distance a part.

A square plate of 0.1 m side moves parallel to a second plate with a velocity of 0.1 m//s , both plates being immersed in water. If the viscous force is 0.002 N and the coefficient of viscosity is 0.01 poise , distance between the plates in m is