Oscillations — Physics STD 11 Science — Question

Find the moment of inertia of a pair of spheres, each having a mass m and radius r, kept in contact about the tangent passing through the point of contact.

Write the statements of second law of thermodynamics applicable to:

1. Heat engine.
2. Refrigerator.

Find the dimensions of:

1. Electric dipole moment p.
2. Magnetic dipole moment M.

The defining equations are p = q.d and M = IA, where d is distance, A is area, q is charge and I is current.

The difference between length of a certain brass rod and that of a steel rod is claimed to be constant at all temperatures. Is this possible?

Consider a pair of identical pendulums, which oscillate with equal amplitude independently such that when one pendulum is at its extreme position making an angle of 2° to the right with the vertical, the other pendulum makes an angle of 1° to the left of the vertical. What is the phase difference between the pendulums?

Explain why (or how):
The shape of a pulse gets distorted during propagation in a dispersive medium.

Does it matter if one uses gauge instead of absolute pressures in applying Bernoulli’s equation? Explain.

A hollow spherical body of inner and outer radii 6cm and 8cm respectively floats half submerged in water. Find the density of the material of the sphere.

Why a tennis ball bounces higher on hills than on plains?