When a chalk piece is immersed in water , bubbles are emitted : why ?

Assertion: When a glass prism is immersed in water, the deviation caused by prism decreases. Reason: Refractive index of glass prism relative to water is less than that relative to air.

When a soap bubble is charged

If a plant cell is immersed in water, the water continues to enter the cell until the .........

Give scientific reasons When a pencil is partly immersed in water and held in a slanting position, it appears to be bent at the boundary separating water and air.

A capillary tube of radius r is immersed in water and water rises in to a height h. The mass of water in the capillary tube is 5g. Another capillary tube of radius 2 r is immersed in water. The mass of water that will rise in this tube is

A sonometer wire is in unison with a tuning fork when it is stretched by a weight of specific gravity 9. When the weight is completely immersed in water, 10 beats per second are heard .Calculate the frequency of the tuning fork.

Why HCl is strong acid in water.

When a piece of ice is placed in water at room temperatur, ice melts and water cools down. Why does their temperture change?

One end of a glass capillary tube with a radius r is immersed into water to a depth of h The surface tension of water is s and atmospheric pressure is p_0 . What pressure is required to blow an air bubble out of the lower end of the tube? Density of water is rho

A concave mirror of focal length f (in air) is immersed in water (mu=4//3) . The focal length of the mirror in water will be