DSAS Schools

Comparison $|$ TCCN$...$

The Jane Collective...

The History of Abor...

Reproductive Rights...

The Racist History o$...$

Scarlet Letters: Getti...

Other favorites

Submit Answer

$8.[-/1$ Points$]$

OSCOLPHYS$201617\mathrm{.}3.$WA$\mathrm{.}012.$

The electrical power needed to operate a speaker in your audio system is $24\mathrm{.}7$ W $.$ If this speaker has a circular opening with a radius of $0\mathrm{.}0863$ m and the average sound intensity at the opening is $17\mathrm{.}1\frac{W}{m^2},$ determine the ratio of sound output power $P_{\text{s}\text{o}\text{u}\text{n}\text{d}}$ to electrical input power $P_{\text{e}\text{l}\text{e}\text{c}\text{t}\text{r}\text{i}\text{c}\text{a}\text{l}}.$

$\frac{P_{\text{s}\text{o}\text{u}\text{n}\text{d}}}{P_{\text{e}\text{l}\text{e}\text{c}\text{t}\text{r}\text{i}\text{c}\text{a}\text{l}}}=$

$$

$9.[-/1$ Points$]$ OSCOLPHYS$201617\mathrm{.}3.$WA$\mathrm{.}013.$

Two speakers, each with a power output of $0\mathrm{.}380$ W $,$ are mounted facing each other and $31\mathrm{.}8$ m apart. If the speakers are each broadcasting an amplified static buzz uniformly in all directions, determine the following.

$($a$)$ the total sound intensity a person hears when they are midway between the speakers

$\frac{W}{m^2}$

$($b$)$ the total sound intensity the person hears after they move directly toward one of the speakers for a distance of $3\mathrm{.}7$ m

$\frac{W}{m^2}$

Both questions