Motion in a Straight Line — Physics STD 11 Science — Question

While gas from a cooking gas cylinder is used, the pressure does not fall appreciably till the last few minutes. Why?

Two bodies of different masses m, and m, are dropped from two different heights 'a' and 'b'. What is the ratio of time taken by the two to drop through these distances?

The vernier scale of a travelling microscope has 50 divisions which coincide with 49 main scale divisions. If each main scale division is 0.5mm, calculate the minimum inaccuracy in the measurement of distance.

Write an expression for the moment of inertia of a ring of mass M and radius r.

1. About an axis passing through its centre and perpendicular to its plane.
2. About its diameter.
3. About a tangent in its own plane.
4. About a tangent perpendicular to the plane of the ring.

If a particle is accelerating, it is either speeding up or speeding down. Do you agree with this statement?

Answer the following:
The mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more reliable estimate than a set of 5 measurements only?

Can we conclude from the interference phenomenon whether light is a transverse wave or a longitudinal wave?

A gas is enclosed in a cylindrical vessel fitted with a frictionless piston. The gas is slowly heated for some time. During the process, 10J of heat is supplied and the piston is found to move out 10cm. Find the increase in the internal energy of the gas. The area of cross section of the cylinder = 4cm² and the atmospheric pressure = 100kPa.