But the answer is (m₂/m₁)².

Q1 A pointer attached to one prong of a tuning fork just presses against a plate and 30 complete waves were counted by the time the plate fell by 0.1 m.Calculate the frequency of the prong.

Q2 The fundamental frequency of a closed organ pipe is 400 Hz. If a hole be made 10 cm below the open end,



       what will be the fundamental frequency?

Q3 For y= acos(kx)cos(wt), find the shape of graph of:

      a) Change in pressure of the medium at t=0.

      b) Density of the medium at t=T/2.

    SALUTES ASSURED TO ALL CORRECT ANSWERS.

Q. Two spheres of radii R1 and R2 have densities d1 and d2 and specifc heats C1 and C2. If they are heated to the same temp., the ratio of their rates of cooling will be ---------------.

Q. A double star is a system of two stars(say having masses m1 and m2) moving around the centre of inertia of the system due to gravitation. Then,ratio of sweeps of area osf star of mass m1 to the star of mass m2 is ----------------------------.

Q1  A square frame of side L is dipped in a liquid soap solution. When it is taken out of the liquid, a soap film is formed on it. If the surface tension of soap is T, then the force acting on the frame is -----------

Q2  16 cm3 of water flows per sec thru a capillary tube of radius 'a' and of length l and when connected to a pressure head of h cm of water. I f a yube of same lengthand radius a/2 is connected to the same pressure head ,the quantity of water flowing thru the tube per sec will be -----------------.

             5 SALUTES ASSURED TO ALL CORRECT SOLUTIONS!!!!!!

The answer is d.

Dunno how,though.

Q. A solid sphere starts from rest at the top of an incline of height h and length l and moves down.The force of friction between the sphere and the incline is F.The friction is F. The friction is insufficient to prevent slipping.The kinetic energy of the sphere at the bottom of the incline is K. Then,

    A)the work done by friction is Fl.

    B)the heat produced is Fl.

    C)K=mgh-Fl.

    D)K>mgh-Fl.

The ratio of specific charge of a proton and an -particle is...............