Intensity of a sound wave from a point source at a distance rfrom the source is I. The intensity at a distance 2r will be

If the amplitude of waves at a distance r from line source is A . The amplitude at a distance 4r will be

The intensity of sound from a point source is 1.0 xx 10^-8 Wm^-2 , at a distance of 5.0 m from the source. What will be the intensity at a distance of 25 m from the source ?

The intensity of sound from a public loud speaker is 1mu "watt m"^(-2) at a distance of 5 m. What is the intensity at a distance of 100 m ?

If A is the amplitude of the wave coming from a line source at a distance r, then :

The intensity of the ground waves decrease with increase of distance due to

The intensity of sound from a radio at a distance of 2 metres from its speaker is 1xx10^(-2) mu W//m^(2) . The intensity at a distance of 10 meters would be

The intensity of a point source emitting sound at distance 3 from the source is 0.707 W//m^2? What is the average power output of the source ?

The intensity of a wave emitted from a small source at a distance 10 m is 20 xx 10^(-3)"Wm"^(-2). What is the intensity at a distance 100 m ?

Loudness of sound from an isotropic point source at a distace of 70cm is 20dB . What is the distance (in m) at which it is not heard.

The intensity produced by a long cylindrical light source at a small distance r from the source is proportional to