Class XI Physics Waves 1

A sine wave has an amplitude A and a wavelength λ. Let V be the wave velocity, and v be maximum velocity of a particle in the medium.

The velocity of sound in air at20 °C and 1 atm pressure is 344.2 m/s. At 40 °C and 2 atm pressure, the velocity of sound in air is approximately

A long string having a cross-sectional area 0.80 mm² and density 12.5 g/cm³ is subjected to a tension of 64 N along the X-axis. One end of the string is attached to a vibrator moving in transverse direction. At t = 0, the source is at maximum displacement y = 1 cm. Find the speed of wave travelling on the string.

Sound waves have the following frequencies that are audible to human beings-

Consider the following statements about sound passing through a gas.
A. The pressure of the gas at a point oscillates in time.
B. The position of a small layer of the gas oscillates in time.

Find the change in the volume of 1 Liter kerosene when it is subjected to an extra pressure of 2 × 10⁵ N/m² from the following data. Density of kerosene is 800 kg/m³ and speed of sound in kerosene is 1330 m/s.

The speed of sound in a medium depends on-

To observe diffraction, the size of the obstacle