Mechanical Prop...

A capillary tube is dipped in water vertically.Water rises to a height of 10mm. The tube is now tilted and makes an angle 60$$^{o}$$ with vertical.Now water rises to a height of:

The liquid meniscus in a capillary tube will be convex, if the angle of contact is :

A capillary tube when immersed vertically in a liquid rises to 3 cm. If the tube is held immersed in the liquid at an angle of 60$$^{o}$$ with the vertical,the length of the liquid column along the tube will be:

A vessel whose bottom has round holes with diameter of $$1mm $$ is filled with water. Assuming that surface tension acts only at holes, then the maximum height to which the water can be filled in vessel without leakage is

Four identical capillary tubes $$a, b, c$$ and $$d$$ are dipped in four beakers containing water with tube ‘$$a$$’ vertically, tube ‘$$b$$’ at $$30^{o}$$, tube ‘$$c$$’ at $$45^{o}$$ and tube ‘$$d$$’ at $$60^{o}$$ inclination with the vertical. Arrange the lengths of water column in the tubes in descending order.

Match List I with List - II

Rain drops fall with terminal velocity due to:

Three tubes A, B, C are connected to a horizontal pipe in which liquid is flowing. The radii of the pipes at the joints of A, B and C are 2 cm, 1 cm and 2 cm respectively. The height of the liquid:

A water barrel having water up to depth '$$d$$' is placed on a table of height '$$h$$'. A small hole is made on the wall of the barrel at its bottom. If the stream of water coming out of the hole falls on the ground at a horizontal distance '$$R$$' from the barrel, then the value of '$$d$$' is:

A solid rubber ball of density 'd' and radius 'R' falls vertically through air. Assume that the air resistance acting on the ball is F $$=$$ KRV where K is constant and V is its velocity. Because of this air resistance the ball attains a constant velocity called terminal velocity $$V_{T}$$ after some time.Then $$V_{T}$$ is: