jacobiroberts18

11.12.2019 • 

Physics

Afan at a rock concert is 50.0 m from the stage, and at this point the sound intensity level is 114 db. sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate . typically, the diameter of this membrane is about 8.40 mm in humans.
a.how much energy is transferred to her eardrums each second ? b.how fast would a 2.00 mg mosquito have to fly to have this much kinetic energy? c.how fast a typical 2.0 mg mosquito would have to fly (in mm/s) to have an amount of energy delivered to the eardrum each second when someone whispers (20 db) a secret in your ear? d.compare the mosquito's speeds found in parts (b) and (c).

Ответ:

roygbiv1233

12.01.2022

Physics

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A)

B)

C)

D) mosquitoes speed in part B is very much larger than that of part C.

Explanation:

Given:

Distance form the sound source, sound intensity level at the given location, diameter of the eardrum membrane in humans, We have the minimum detectable intensity to the human ears,

(A)

Now the intensity of the sound at the given location is related mathematically as:

..........................................(1)

As we know :

is the energy transferred to the  eardrums per second.

(B)

mass of mosquito,

Now the velocity of mosquito for the same kinetic energy:

(C)

Given:

Sound intensity,

Using eq. (1)

Now, power:

Hence:

(D)

mosquitoes speed in part B is very much larger than that of part C.

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Ответ:

kingbudd129

04.12.2020

Physics

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Wave A has a higher amplitude than Wave B.

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