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Chapter 2: Q5DQ (page 537)

Symphonic musicians always “warm up” their wind instruments by blowing into them before a performance. What purpose

does this serve?

Short Answer

Expert verified

The constant temperature of body air helps the instrument to work well at the resonant frequencies.

Step by step solution

01

Write the given data:

Symphonic musicians always warms up their instruments.

02

Determine the concept

Consider the formula for the wavelength in terms of the frequency and the speed of wave as:

λ=vsf

Here, the frequency is f and the speed of the wave is vs.

03

Determine the reason for the given condition

Consider that the symphonic musicians warm the instruments with the air blown from their mouth as the air from the mouth is at the body temperature. The air blown in the instruments is during the performance when the instrument is operated. This results in the constant supply of air in the instrument with the constant temperature

Constant temperature of the air helps the speed of the sound well because the temperature of the air determines the resonant frequencies at which the instruments works.

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Most popular questions from this chapter

Lane dividers on highways sometimes have regularly

spaced ridges or ripples. When the tires of a moving car roll along

such a divider, a musical note is produced. Why? Explain how this

phenomenon could be used to measure the car’s speed.

Does an aircraft make a sonic boom only at the instant its speed exceeds Mach 1? Explain.

Because the speed of ultrasound in bone is about twice the speed in soft tissue, the distance to a structure that lies beyond a bone can be measured incorrectly. If a beam passes through 4cmof tissue, then 2cmof bone, and then another 1cmof tissue before echoing off a cyst and returning to the transducer, what is the difference between the true distance to the cyst and the distance that is measured by assuming the speed is always 1540m/s? Compared with the measured distance, the structure is actually

(a) 1cmfarther

(b) 2cmfarther

(c) 1cmcloser

(d) 2cmcloser

BIO Ultrasound in Medicine. A 2.00-MHz soundwave travels through a pregnant woman’s abdomen and is reflected from the fatal heart wall of her unborn baby. The heart wall is moving toward the sound receiver as the heart beats. The reflected sound is then mixed with the transmitted sound, and 72 beats per second are detected. The speed of sound in body tissue is 1500 m/s. Calculate the speed of the fatal heart wall at the instant this measurement is made.

The longest pipe found in most medium-size pipe organs is 4.88 m (16 ft) long. What is the frequency of the note corresponding to the fundamental mode if the pipe is (a) open at both ends, (b) open at one end and closed at the other?
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