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const2013 [10]
3 years ago
15

A wave has a frequency of 58 hz and a speed of 31 m/s. what is the wavelength of this wave?

Physics
1 answer:
marin [14]3 years ago
4 0
First remember the equations for wavelength and frequencies:

v = fw

Now let's plug in what we know from the question:

(31 m/s) = (58 Hz) w

Use the calculator and you'll get the value of wavelength, w! If you comment your answer I'll check it for you. :)
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3 years ago
If the velocity of blood flow in the aorta is normally about 0.32 m/s, what beat frequency would you expect if 4.40-MHz ultrasou
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Answer:

The beat frequency is 0.0019 MHz.

Explanation:

Given that,

Velocity = 0.32 m/s

Frequency = 4.40 MHz

Speed of wave = 1540 m/s

We need to calculate the frequency

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Observer is moving away from the source

Using Doppler's effect

f'=\dfrac{v-v'}{v}f

Where, v' = speed of observer

Put the value into the formula

f'=\dfrac{1540-0.32}{1540}\times4.40

f'=4.399\ MHz

Case (II),

Cell is as the source of sound of frequency f' and it moving away from the observer.

Using formula of frequency

f''=\dfrac{v-v_{s}}{v+v_{s}}\times f

f''=\dfrac{1540-0.32}{1540+0.32}\times4.399

f''=4.3971\ MHz

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\Delta f= f'-f''

\Delta f=4.399-4.3971=0.0019\ MHz

Hence, The beat frequency is 0.0019 MHz.

4 0
3 years ago
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