A rock band give rise to an average sound level of `102 dB` at a distance of `20 m` from the center of the band . As an approximation , assume that the band radiates sound equally into a sphere. What is the sound power output of the band?

(a) What is the intensity of a 60 dB sound ? (b) If the sound level is 60 dB close to a speaker that has an area of 120 cm ^(2) . What is the acoustic power output of the speaker?

(a) What is the intensity of a 60 dB sound ? (b) If the sound level is 60 dB close to a speaker that has an area of 120 cm ^(2) . What is the acoustic power output of the speaker?

The sound level at a distance of 3.00 m from a source is 120 dB. At what distance will the sound level be (a) 100 dB and (b) 10.0 dB?

The sound level at a distance of 3.00 m from a source is 120 dB. At what distance will the sound level be (a) 100 dB and (b) 10.0 dB?

The sound level at a distance of 3.00 m from a source is 120 dB. At what distance will the sound level be (a) 100 dB and (b) 10.0 dB?

A firework charge is detonated many metres above the ground. At a distance of 400 m from the explosion, the acoustic pressure reaches a maximum of 10.0(N)/(m^2) . Assume that the speed of sound is constant at 343 (m)/(s) throughout the atmosphere over the region considered, the ground absorbs all the sound falling on it, and the air absorbs sound energy at the rate of 7.00 (dB)/(km) . What is the sound level (in decibels) at 4.00 km from the explosion?

A firework charge is detonated many metres above the ground. At a distance of 400 m from the explosion, the acoustic pressure reaches a maximum of 10.0(N)/(m^2) . Assume that the speed of sound is constant at 343 (m)/(s) throughout the atmosphere over the region considered, the ground absorbs all the sound falling on it, and the air absorbs sound energy at the rate of 7.00 (dB)/(km) . What is the sound level (in decibels) at 4.00 km from the axplosion?

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 ?

In Young's double slit experiment the wavelenght of light used is 5000 Å the slit -separation is 0.2 mm and the screen is placed at a distance 200 cm from the slits . Central maxima is at x=0 . If the central maxima is assumed as the zeroth bright band then what will be the distance of the third bright band?

At a distance of 20m from a point source, the loudness is 30dB . After a minimum distance of k ( 300 sqrt(10) ) m the sound is inaudible. Value of k is