Laws of Motion — Physics STD 11 — Question

The acceleration due to gravity near the surface of a planet of radius R and density d is proportional to:

A missile fired from a launcher explodes in mid air, its total

Two vessels have equal volumes. One of them contains hydrogen at one atmosphere and the other helium at two atmospheres. If both the samples are at the same temperature, the rms velocity of the hydrogen molecules is …..

Which of the following graph represents the equation y = mx – C?

A source of sounds is travelling with a velocity of 40 km/hr towards an observer and emits sound of frequency 2000 Hz. If the velocity of sound is 1220 km/hr, then what is the apparent frequency heard by the observer?

Heat capacity of a substance is infinite. It means …….

When a rigid body moves all particles that constitute the body follows-

The Earth E moves in an elliptical orbit with the Sun S at one of the foci as shown in figure. Its speed of motion will be maximum at a point ……..

A girl is swinging on a swing in the sitting position. How will the period of swing be affected if she stands up?

The angle between two collinear vectors is / are –