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

The word physics is derived from the word …..

The ratio of total path length travelled by the particle in a time interval –

Newtons laws are applicable in –

Aeroplanes are made to run on runway before take-off because it ………

A metallic solid sphere is rotating about its diameter as axis of rotation. If the temperature is increased by 200°C, the percentage increase in its moment of inertia is : (coefficient of linear expansion of the metal = 10-5/°C)

The weight of an astronaut, in an artificial satellite revolving around the Earth is:

A car moves from X to Y with a uniform speed Vn  and returns to Y with a uniform speed Vd The average speed for this round trip is –

The motion of the center of mass of a system consists of many particles describes its –

Ultrasonic waves are those waves which ………

To what temperature should the hydrogen at room temperature (27°C) be heated at constant pressure so that the RMS velocity of its molecules becomes double its previous value?