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

A diatomic ideal gas is used in a camot engine as the working substance. If during the adiabatic expansion part of the cycle, the volume of the gas increases from V to 32 V, the efficiency of the engine is ……

Zero error of an instrument is a ……

A vibrating stretched string resonates with a tuning fork of frequency 512 Hz when the length of the string is 0.5 m. The length of the string required to vibrate resonantly with a tuning fork of frequency 256 Hz would be ……

The position of center of mass can be written in the vector form as –

A loaded spring vibrates with a period T. The spring is divided into four equal parts and the same load is suspended from one as these parts. The new time period is ………

A body of mass m is taken from the Earth’s surface to a height equal to the radius R of the earth. If g is the acceleration to gravity at the surface of the Earth, then find the change in the potential energy of the body ……

The working of an atomiser depends on ….

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

The dimension of point mass is –

The motion of center of mass depends on-