Physics Past Questions and Answers

The pressure of a given mass of a gas changes from 200Nm^-2 to 120Nm^-2 while the temperature drops from 127°C to -73°C. The ratio of the final volume to the initial volume is

The thermometric substance of an absolute thermometer is

A plane sound wave of frequency 85.5Hz and velocity 342ms^-1 is reflected from a vertical wall. At what distance from the wall does the wave have antinode?

A string is fastened tightly between two walls 24cm apart. The wavelength of the second overtone is

A gas with initial volume of 2 X 10^-6m³ is allowed to expand to six times its initial value at constant pressure of 2 x 10⁵Nm^-2. The work done is