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attashe74 [19]
2 years ago
6

Helpppp plzzzzz for 20 points

Physics
1 answer:
victus00 [196]2 years ago
7 0

Answer:

only answering without answer bc im annoyed its for 10 points not 20

Explanation:

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Warm water<span> has more energy </span><span>than cold water</span>
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A child has an ear canal that is 1.3 cm long. Assume the speed of sound is v = 344 m/s.
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Answer:

The  frequencies are (f, f_1) =  (6615.4 \ Hz , 19846.2\ Hz)

Explanation:

From the question we are told that

  The  length of the ear canal is  l = 1.3 \ cm  =\frac{1.3}{100}  =  0.013 \ m

   The  speed of sound is assumed to be  v_s  =  344 \ m/s

Now  taking look at a typical  ear canal  we see that we assume it is  a  closed pipe

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          f = \frac{344}{4 * 0.013 }

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Also the the second harmonic for the pipe (ear canal) is mathematically represented as

        f_1 =  \frac{3v_s}{4 * l}

 substituting values  

       f_1 =  \frac{3 *  344}{4 * 0.013}

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Given that sound would be loudest in the pipe at the frequency, it implies that the child  will have an increased audible sensitivity at this  frequencies

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3 years ago
A man leave his townA at 8 am for town B which is 384km away and he reach at4pm what is average speed in m/s
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So the answer is A.
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