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Svetllana [295]
2 years ago
9

The speed of sound is 344 m/sec when the air is 20 degrees Celsius how far is the source of the sound if it takes 8 seconds for

the sound to reach you?
Physics
1 answer:
pishuonlain [190]2 years ago
5 0

Answer: 2752 m

Explanation:

344*8=

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When the ambulance passes the person (switching from moving towards him to moving away from him), the perceived frequency of the
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To develop this problem we will apply the considerations made through the concept of Doppler effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other. At first the source is moving towards the observer. Than the perceived frequency at first

F_1 = F \frac{{343}}{(343-V)}

Where F is the actual frequency and v is the velocity of the ambulance

Now the source is moving away from the observer.

F_2 = F\frac{343}{(343+V)}

We are also so told the perceived frequency decreases by 11.9%

F_2 = F_1 - 9.27\% \text{ of } F_1

F_2 = F_1-0.0927F_1

F_2 = 0.9073F_1

Equating,

F\frac{343}{(343+V)}= 0.9073(F\frac{343}{(343-V)})

\frac{1}{(343+V)}= 0.9073\frac{1}{(343-V)}

0.9073(343+V) = 343-V

(0.9073)(343)+(0.9073)V = 343-V

V+0.9073V = 343-(0.9073)(343)

Solving for V,

V = 16.67 m/s

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3 years ago
A coil of wire is comprised of 5 turns, has a current of 2 mA running through it, and a net magnetic field at its center of B is
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Answer:

<em>20cm</em>

Explanation:

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<em>The radius of a coil of wire with N turns is r = 0.28 m. A clockwise current of Icoil = 1.0 A flows in the coil,</em>

<em>Therefore 40/2mA = 20</em>

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<em>hey there! ;D</em>

A) aorta - goes on the top right

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C) right atrium - goes on top left

F) right ventricle - goes below right atrium

<em>hope this helps!</em>

<em>have an awesome day ;)</em>

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