Aconcert loudspeaker suspended high off the ground emits 39 w of sound power. a small microphone with a 1.0 cm2 area is 60 m from the speaker. part a what is the sound intensity at the position of the microphone?

As we know that intensity of sound is defined as power received per unit area

so here the power of source is given as

distance of microphone is given as

now if loudspeaker is considered as spherical source then we will have

here

r = d = 60 m

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

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