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muminat
3 years ago
11

IS THIS CORRECT???...........................

Physics
1 answer:
never [62]3 years ago
8 0

Answer:

<u><em>A. consumers</em></u>

<u><em>B. multi-cellular</em></u>

Explanation:

Only plants have chlorophyll and only plants have a cell wall so C and D are out of the window. They are consumers because, they don't have photosynthesis so they have to eat. They are multi-cellular because, animals all have at least a brain, body, etc. Which all need millions of cells.

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Human perception of the frequency of sound waves is called:
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Answer:

The study of the human perception of sound is called psychoacoustics.

Explanation:

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2 years ago
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2 years ago
A police car is traveling due east at a speed of 15.0 m/s relative to the earth. You are in a convertible following behind the p
Neporo4naja [7]

Answer:

A.) 355 m/s

B.) 0.71 m

C.) 500Hz

Explanation:

Given that a police car is traveling due east at a speed of 15.0 m/s relative to the earth. You are in a convertible following behind the police car. Your car is also moving due east at 15.0 m/s relative to the earth, so the speed of the police car relative to you is zero. The siren of the police car is emitting sound of frequency 500 Hz. The speed of sound in the still air is 340 m/s

a.) What is the speed of the sound waves relative to you?

Since the car is moving away from the observer, the relative velocity will be:

Relative velocity = 340 + 15

Relative velocity = 355 m/s

b.) What is the wavelength of the sound waves at your location?

Using the wave speed formula

V = frequency × wavelength

Make wavelength the subject of formula.

Wavelength = Velocity / frequency

Wavelength = 355/500

Wavelength = 0.71 m

c.) What frequency do you detect?

Fo = Fs ( C + V ) / ( C + v )

Fo = Fs

That is, the frequency of the observer will be equal to the frequency of the source.

Therefore, Fo = 500Hz

4 0
2 years ago
Which statements about Earth’s core help explain Earth’s magnetic field? Select three options.
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5 0
3 years ago
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Assuming that the collision is inelastic that is they are stuck together after the collision, momentum is conserved. We can determine the final velocity of the final mass as follows:

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Therefore, the final mass moves at 0.6667 m/s to the left.
5 0
3 years ago
Read 2 more answers
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