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irinina [24]
3 years ago
5

4. Which scientist proposed the theory that the Moon formed from fission? (5 points)

Physics
1 answer:
NeTakaya3 years ago
7 0
The answer would be B, George Darwin :)
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Chemical phenomenon by virtue of which a body or compound is transformed by the action of an oxidant
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A brick is thrown vertically upward with an initial speed of 3.00 m/s from the roof of a building. If the building is 78.4 m tal
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0.918 sec

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The resistivity of a semiconductor can be modified by adding different amounts of impurities. A rod of semiconducting material o
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pp

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Which of the following are possible causes of mass extinctions that scientists have identified
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Answer:

over harvesting, pollution, introduction of invasive species such as new predators and food competitors

Explanation:

The main cause of mass extinction is Humans cause extinction of a species through overharvesting. The second main  cause is pollution ., introduction of invasive species such as new predators and food competitors, habitat destruction, overhunting and other influences. Another very important cause of mass extinction is the unsustainable human population growth.

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Triassic -Jurassic Mass Extinction

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4 0
3 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
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