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ASHA 777 [7]
4 years ago
5

Parasaurolophus was a dinosaur whose distinguishing feature was a hollow crest on the head. The 1.5-m-long hollow tube in the cr

est had connections to the nose and throat, leading some investigators to hypothesize that the tube was a resonant chamber for vocalization. If you model the tube as an open-closed system, what are the first three resonant frequencies?
Physics
1 answer:
Oksi-84 [34.3K]4 years ago
5 0

Answer:

f1 = 58.3Hz, f2 = 175Hz, f3 = 291.6Hz

Explanation:

lets assume speed of sound is 350 m/s.

frequencies of a standing wave modes of an open-close tube of length L

fm = m(v/4L)

where m is 1,3,5,7......

and fm = mf1

where f1 = fundamental frequency

so therefore: f1 = 350 x 4 / 1.5

f1 = 58.3Hz

f2 = 3 x 58.3

f2 = 175Hz

f3 = 5 x 58.3

f3 = 291.6Hz

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ikadub [295]

Answer:

The value is \lambda = 0.335 \  m  

Explanation:

From the question we are told that

     The length of the string is  l  =  0.67 \  m

      The mass is  m  = 2.0 \  g  =  0.002 \  kg

      The frequency produced at  fourth harmonic vibration(i.e n =4 )  is  f =  700 \  Hz

  Generally the wavelength of the string is  mathematically represented as

            \lambda = \frac{ 2L }{n }

=>          \lambda = \frac{ 2 * 0.67 }{ 4 }  

=>          \lambda = 0.335 \  m  

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3 years ago
When Jacob bats a baseball with a net force of 4.719 N, it accelerates 33 m/s2. What is the mass of the baseball?
Natasha2012 [34]

Answer:

its 24

Explanation:

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3 years ago
How do you get smarter.... that's what brought me here...
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3 years ago
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A ball is launched from ground level at 30 m/s at an angle of 35° above the horizontal. how far does it go before it is at groun
frutty [35]

Answer:

Explanation:

Ignoring air resistance

Initial vertical velocity is 30sin35 = 17.2 m/s

Gravity reduces this velocity to zero in a time of

t = v/g =17.2 / 9.8 = 1.755 s

it takes the same time to come back down to ground level for a total flight time of 2(1.755) = 3.51 s

The horizontal velocity is 30cos35 = 24.57 m/s

the distance traveled horizontally is

d = vt = 24.57(3.51) = 86.298... = 86 m

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You should maintain 5-6 second driving a heavy vehicle or towing a trailer.

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