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agasfer [191]
2 years ago
8

The frequency of a certain sound is 440 Mz. What is the wavelength of this sound when the temperature of the air is (a) 20°C; (b

) 30°C
Physics
1 answer:
Serggg [28]2 years ago
3 0

Answer:

Explanation:

We know the frequency and the velocity, both of which have good units. All we have to do is rearrange the equation and solve for

λ

:

λ

=

v

f

Let's plug in our given values and see what we get!

λ

=

340

m

s

440

s

−

1

λ

=

0.773

m

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Answer:

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b) F = -451,520N

Explanation:

part a.

we know that:

I = P_f-P_i

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so:

I = MV_f-MV_i

where M is the mass, V_f the final velocity and V_i the initial velocity.

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now, we will use the law of the conservation of energy:

E_i=E_f

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solving for V_i:

V_i = 26.56m/s

Then, replacing in the initial equation:

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part b.

we know that:

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Answer:

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