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Chapter 17: Q. 74 (page 487)

You have two small, identical boxes that generate 440 Hz

notes. While holding one, you drop the other from a 20-m-high

balcony. How many beats will you hear before the falling box hits

the ground? You can ignore air resistance.

Short Answer

Expert verified

The solution gives a detailed description of air resistance and

two small, identical boxes that generate 440 Hz

notes

Step by step solution

01

Description of resistance

Resistance is a measure of opposite current flow in an electrical circuits

02

Step 2; Description on the frequency, time and period

Provided solutions

The integral beat of frequency

N=∫0ffB(t)tdt

The heard frequency will bef-f01+vxv=f0vv+vs

as per the strategic box the frequency difference is ;

fb=fo-fo-fovv+vs=(1-vv+vs)fo

03

The integral part becomes

dudt=g→dt=dug∫duu=lnu+CN=440.(222-3439.8.2+34329.82ln343+9.8.2343

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Most popular questions from this chapter

M?

Deep-sea divers often breathe a mixture of helium and oxygen to avoid getting the “bends” from breathing high-pressure nitrogen. The helium has the side effect of making the divers’ voices sound odd. Although your vocal tract can be roughly described as an open-closed tube, the way you hold your mouth and position your lips greatly affects the standing-wave frequencies of the vocal tract. This is what allows different vowels to sound different. The “ee” sound is made by shaping your vocal tract to have standing- wave frequencies at, normally, 270 Hz and 2300 Hz. What will these frequencies be for a helium-oxygen mixture in which the speed of sound at body temperature is 750 m/s? The speed of sound in air at body temperature is 350 m/s.

FIGURE EX17.27 shows the circular wave fronts emitted by two

wave sources.

a. Are these sources in phase or out of phase? Explain.

b. Make a table with rows labeled P, Q, and R and columns

labeled r1,r2,∆r,and C/D. Fill in the table for points P, Q, and

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or destructive.

The lowest note on a grand piano has a frequency of 27.5 Hz. The entire string is 2.00 m long and has a mass of 400 g. The vibrating section of the string is 1.90 m long. What tension is needed to tune this string properly?

A particularly beautiful note reaching your ear from a rare Stradivarius violin has a wavelength of 39.1 cm. The room is slightly warm, so the speed of sound is 344 m/s. If the string’s linear density is 0.600 g/m and the tension is 150 N, how long is the vibrating section of the violin string?
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