physics experiments of class 9

Now, repeat the whole experiment with castor oil (half kg) in the same vessel. Let its initial temperature be Again heat it exactly for two minutes (so that same amount of heat is supplied to castor oil). Note its temperature as The experiment may be repeated with different liqu..

Take half kg of water in a vessel. Note its temperature Heat it for exactly 2 minutes using a Bunsen burner. Again note down its temperatur..

This is also a very weak force. From the above two examples, it is clear why we do not experience the force exerted by one object (on the surface of Earth) on the othe..

The distance x n of the n t h bright from the central fringe, in Young's experiment is Given n = 10: l = 589 10 - 9 m: D=4m d= 2 10 - 1 3 = 0.01178 m = 1.17..

Velocity of Sound in Liquids and Solids - modulus of the liquid r is its density. For water, at a temperature of 20 o C, B = 2.05 x 10 9 Nm - 2 and r = 1000 kmg -3 The velocity of sound in water was determined by Daniel Colladon and Jacob Sturm in the lake of Geneva in 1827. Two observers..

where e 0 is the permittivity of space. The value of e 0 = 8.854 x 10 - 1 2 C 2 /Nm 2 which was obtained by experiments. Thus, K = 8.988 x 10 9 Nm 2 /C ..

The unit of charge is Coulomb and is denoted by C. One coulomb of charge, is that charge which when placed one metre from another charge in vacuum experiences an electrical force of repulsion of magnitude 9 x 10 9 N . (b) If the charges are immersed in matter, then ..

Specific Heat - From the experiments, we know that the quantity of heat supplied Q is proportional to mass of the substance (m) increase in temperature t (t 2 - t 1 ) Q = S m (t 2 -t 1 )------- (1) S is the constant of proportionality. It is a characteristic feature of the substance and i..

Summary - Pressure at a point in a liquid depends upon the depth and on the density of the liquid. The pressure at any depth in a liquid acts equally in all directions. Liquids always find their own level. Pressure applied at any point in a confined liquid is transmitted equally in all the directio..

Diffusion in Liquids - If a bottle of perfume is opened in one corner of a room, it spreads in the whole room by diffusion. If you drop a little ink in a beaker of water it will spread by itself in the beaker of water and the color spreads uniformly. Diffusion is the natural process of interminglin..