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

The word physics is derived from the word …..

The study of forces acting on bodies whether at rest or in motion is …..

If the tension on a wire is removed at once, then ……..

Mass of an electron …….

If the lines of forces act in the same plane, they can be –

A metal bob is suspended from a coiled spring. When set into vertical vibrations on the earth. It oscillates up and down with frequency f If the same experiment is carried out in a satellite circling the Earth the frequency of vibration will be …….

Two waves of the same frequency and amplitude super impose to produce a resultant disturbance of the same amplitude. The phase difference between the waves is ……

The equation of a wave moving on string is y = 8 sin{π(0.002 x – 4t)} where x, y are in centimeter and t in seconds. The velocity of the wave is ……

A simple harmonic oscillator has amplitude A and time period T. Its maximum speed is …….

Two gases are enclosed in a container at constant temperature. One of the gases, which is diatomic, has relative molecular mass eight times the other, which is monoatomic. The ratio pf the rms speed of the molecules of the monoatomic gas to that of the molecules of the diatomic gas is