Give the characteristics of inelastic collision.

A mass of 1 g is separated from another mass of 1 g by a distance of 1 cm. How many g-wt of force exists between them?

Name three physical properties which can have different values in different directions.

What happens to surface tension, when impurity is mixed in liquid?

Gas thermometer are more sensitive than mercury thermometer. Why?

Why does specific heat of gases increases with their atomicity ?

What is the phase difference between particle velocity and particle acceleration in SHM?

Is it possible to have interference between the waves produced by two violins? Why?

The length,breadth and height of a rectangular block of wood were measured to be 
\(l=12.13\pm 0.02cm,\quad b=8.16\pm 0.01cm\quad \) \(\\ and\quad h=3.46\pm 0.01cm\)
Determine the percentage error in the volume of the block.

Calculate the earth's surface potential from the following data.
(i) Radius of the earth, \(R=6.63\times { 10 }^{ 6 }\quad m\)
(ii) Mean density of the earth, \(\rho =5.57\times 10^{ 3 }kgm^{ -3 }\)
(iii) \(G=6.67\times 10^{ -11 }Nm^{ 2 }kg^{ -2 }\)

What do you mean by compressibility? Why are solids least compressible and gases most compressible?

Show that there are two values of time fur same height during the Course of flight of a projectile and the sum of these times is equal to the total time of flight.

A particle of 10 kg mass is moving in a circle of 4 m radius with a constant speed of 5 m/sec. What is its angular momentum about (i) the centre of circle (ii) a point on the axis of the circle and 3 m distant from its centre?

A liquid rises in a capillary such that the surface tension balance its weight of the 5 \(\times\)10^-3 N of liquid, surface tension of liquid is 5 \(\times\)10^-2 Nm^-1 . Find tha radius of the capillary.

When two bodies having temperatures T; and Tz are brought in contact, then the temperature of this system may not be \(\frac { \left( { T }_{ 1 }+{ T }_{ 2 } \right) }{ 2 } \) Explain why?

The motion of a simple pendulum is approximately simple harmonic for small angle oscillations. For larger angles of oscillation, a more involved analysis sjows that T is greater than \(2\pi \sqrt { \frac { l }{ g } } \) .Think of a qualitative argument to appreciate this result.