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2 years ago

Explain how the wave behave as the Frequency changes using the characteristic described in

Physics

1 answer:

Serggg [28]2 years ago

3 0

Let's find the relationship

$\\ \rm\Rrightarrow E=h\nu$

$\\ \rm\Rrightarrow \lambda=\dfrac{c}{\nu}$

So if frequency increases Energy of the wave increases and wavelength decreases and vice-versa

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A train whistle is heard at 300 Hz as the train approaches town. The train cuts its speed in half as it nears the station, and t

givi [52]

To solve this problem we will apply the concepts related to the 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. Mathematically it can be described as,

$f = f_0 (\frac{v_0}{v_0-v})$

Here,

$f_0$ = Frequency of Source

$v_s$ = Speed of sound

f = Frequency heard before slowing down

f' = Frequency heard after slowing down

v = Speed of the train before slowing down

So if the speed of the train after slowing down will be v/2, we can do a system equation of 2x2 at the two moments, then,

The first equation is,

$f = f_0 (\frac{v_0}{v_0-v})$

$300 = f_0 (\frac{343}{343-v})$

$(300*343) - 300v = 343f_0$

Now the second expression will be,

$f' = f_0 (\frac{v_0}{v_0-v/2})$

$290 = (343)(\frac{v_0}{343-v/2})$

$290*343-145v = 343f_0$

Dividing the two expression we have,

$\frac{(300*343) - 300v}{290*343-145v} = 1$

Solving for v, we have,

$v = 22.12m/s$

Therefore the speed of the train before and after slowing down is 22.12m/s

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3 years ago

I need someone to help me work through this

Sergio039 [100]

The average rate of change of distance over the time interval
3 ≤ t ≤ 6 represents the coin's average velocity over that interval.

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Schach [20]

Answer:

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The acceleration of an object depends on the ____________ exerted on it and it's_________ this is to do with newton's seconed la

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Force is the first and mass is the second

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3 years ago

Will award brainliest and upvote if you can help answer!

erica [24]

Answer:

Omqnp

Explanation:

I have done this before and got it correct

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2 years ago