Waves — Physics STD 11 Science — Question

Does the centre of mass of a solid necessarily lie within the body? If not, give an example.

Answer the following:
The casing of a rocket in flight burns up due to friction. At whose expense is the heat energy required for burning obtained? The rocket or the atmosphere?

What is the relation for maximum range of water coming out from an orifice on the side wall of a tank?

What is the value of energy absorbed by the system in the adiabatic process?

If a particle is moving on a straight line passing through the origin, then what will be its angular momentum relative to the origin?

A steel rod of cross-sectional area 4cm² and length 2m shrinks by 0.1cm as the temperature decreases in night. If the rod is clamped at both ends during the day hours, find the tension developed in it during night hours. Young's modulus of steel = 1.9 × 10¹¹N/m².

Why does a pendulum clock not work in an artificial earth satellite?

A wire is suspended from a roof but no weight is attached to the wire. Is the wire under stress?

What is the angle between frictional force and instantaneous velocity of the body moving over a rough surface?