A thin square plate of side `5 cm` is suspended vertically a balance so that lower side just dips into water with side to surface. When the plate is clean `(theta=0^@)`, it appears to weigh `0,044 N`. But when the plate is greasy `(theta=180^@)` it appears to weigh `0.03 N`. The surface tension of water is

A thin square plate of side 5cm is suspended vertically from a balance so that lower side just dips into water with side parallel to surface. When the plate is clean (theta = 0^@ ) , it appears to weigh 0.044N. But when the plate is greasy ( theta = 180^@ ) , it appears to weigh 0.03N. The surface tension of water is sigma (10^(-2) Nm^(-1) ) . Find sigma

A clean plate of length 9.8 cm and thickness 0.2 m is in contact with the water . It appears to weigh 3000 dyne . When the plate is greasy and the angle of contact is 180^(@) , it appears to weigh 6000 dyne . Then the surface tension is

Two large glass plates are placed vertically and parallel to each other inside a tank of water with separation between the plates equal to 1 mm. Find the rise of water in the space between the plates. Surface tension of water =0.075Nm^-1 .

Two large glass plates are placed vertically and parallel to each other inside a tank of water with separation between the plates equal to 1 mm. Find the rise of water in the space between the plates. Surface tension of water =0.075Nm^-1 .

Two large glass plates are placed vertically and parallel to each other inside a tank of water with separation between the plates equal to 1 mm. Find the rise of water in the space between the plates. Surface tension of water =0.075Nm^-1 .

A thin uniform square plate ABCD of side a and mass m is suspended in a vertical plane as shown in the figure. AE and BF are two massless inextensible strings. The line AB is horizontal. The tension in AE just after BF is cut will be