PART - 2 CH - 13 Oscillations — Physics STD 11 Science — Question

Area under the force-displacement curve is the measure of ______.

Good reflectors are poor emitters of thermal radiation. Explain.

A closed box is filled with gas and the box is initially at rest. What will be the effect on the motion of the gas molecules and the motion of the center of mass of the box in mutual collision?

Which unit is used to measure size of a nucleus?

The plates of a parallel-plate capacitor are given equal positive charges. What will be the potential difference between the plates? What will be the charges on the facing surfaces and on the outer surfaces?

Answer carefully, with reasons:
What are the answers to (a) and (b) for an inelastic collision?

A LASER is a source of very intense, monochromatic, and unidirectional beam of light. These properties of a laser light can be exploited to measure long distances. The distance of the Moon from the Earth has been already determined very precisely using a laser as a source of light. A laser light beamed at the Moon takes 2.56s to return after reflection at the Moon’s surface. How much is the radius of the lunar orbit around the Earth?

Underline the correct alternative:
In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy/ total linear momentum/ total energy of the system of two bodies.