Avacuum cleaner produces sound with a measured sound level of 75.0 db. (a) what is the intensity of this sound in w/m2? w/m2 (b) what is the pressure amplitude of the sound?

Part a)

Part b)

Explanation:

Part a)

Level of sound = 75 dB

now we know that

here we know that

now we have

Part b)

Intensity of sound wave is given as

here we know that

so we have

now we know

now we have

answer: option c.

explanation:

can be answered using momentum.

momentum = p

p1= mass1 * velocity1

p1 = p2

therefore

p1 = 6kg * 4m/s

p1 = 24kgm/s

p2=m2 * v2

24 kgm/s = 7kg * v2

v2 = 24 kgm/s / 7kg

v2= 3.42 m/s