Mechanical Prop...

Water does not wet an oily glass because

A thin liquid film formed between a U - shaped wire and a light slider supports a weight of 1.5 × 10^–2 N (see figure). The length of the slider is 30 cm and its weight negligible. The surface tension of the liquid film is

In the glass capillary tube, the shape of the surface of the liquid depends upon

The force required to separate two glass plates of area 10^–2 m² with a film of water 0.05 mm thick between them, is (Surface tension of water is 70 × 10^–3 N/m)

The maximum force, in addition to the weight required to pull a wire of 5.0 cm long from the surface of water at temperature 20^oC, is 728 dynes. The surface tension of water is

Surface tension may be defined as

Surface tension of a liquid is found to be influenced by

Small liquid drops assume spherical shape because

A thin metal disc of radius r floats on water surface and bends the surface downwards along the perimeter making an angle θ with vertical edge of the disc. If the disc displaces a weight of water W and surface tension of water is T, then the weight of metal disc is

A 10 cm long wire is placed horizontally on the surface of water and is gently pulled up with a force of 2 × 10^–2 N to keep the wire in equilibrium. The surface tension, in Nm^–1 of water is