Nature of Physical World and Measurement — Physics STD 11 — Question

Ajar has mixture of hydrogen and Oxygen gases in the ratio 1 : 5. The ratio of mean kinetic energies of hydrogen and Oxygen molecules is ……..

The force which opposes the initiation of motion of an object on the surface is –

The motion of a particle is expressed by the equation a = -bx, where x is the displacement from the mean position, a is the acceleration and b is a constant. The periodic time is ………

At the highest point of oblique projection, which of the following is correct?

A simple harmonic oscillator has a period of 0.01 s and an amplitude of 0.2 m. The magnitude of the velocity in m/s at the centre of oscillation is ……..

If the force and displacement are perpendicular to each other, then the work done is

The first derivative of position vector with respect to time is –

The sum of moments of masses of all the particles in a system about the center of mass is-

The speed of a wave in a medium is 760 m/s. If 3600 waves are passing through a point in the medium in 2 minutes, then its wavelength is ……