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Marta_Voda [28]
2 years ago
9

Why does the velocity of P-waves decrease at the mantle-outer Core boundary?

Geography
1 answer:
maria [59]2 years ago
8 0

Answer:

The outer core is more dense

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Urgent does anyone know this?
elena-14-01-66 [18.8K]

Answer:

Lobster

Explanation:

Lobster was also known as the poor man's meal because the overabundance of these guys made it easy for people with no money to get their protein. In fact, these crustaceans were fed to prisoners, apprentices and slaves.

6 0
3 years ago
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Beneath a blanket of sediments, oceanic crust is primarily composed of ________. Group of answer choices
atroni [7]

Answer:

Gabbro and basalt

Explanation:

The oceanic crust is mainly made of gabbro rocks and different types of basalt rocks.

7 0
2 years ago
it is possible for two stars to have different temperatures and different sizes but the same luminosity. explain how.
Darina [25.2K]

Answer:

Two stars (a and b) can have the same luminosity, but different surface area and temperature if the following condition is met:

(T_a^4)(R_a^2) = (T_b^4)(R_b^2)

Explanation:

The luminosity of a star is the total energy that produces in one second. It depends on the size of the star and its surface temperature.

L = σ(T^4)(4πR^2)

L is the luminosity f the star, T is the temperature of the surface of the star and R is its radius.  

Two stars can have the same luminosity if the relation between the radius and the surface temperature is maintained.  

To see this lets suposed you have 2 stars, a and b, and the luminosities of each one of them:

L_a = σ(T_a^4)(4πR_a^2)

L_b = σ(T_b^4)(4πR_b^2)

you can assume that L_a and L_b are equal:

σ(T_a^4)(4πR_a^2) = σ(T_b^4)(4πR_b^2)

Now, you can cancel the constants:

(T_a^4)(R_a^2) = (T_b^4)(R_b^2)

as long as this relation between a and b is true, then the luminosity can be the same.

6 0
3 years ago
To address problems caused by the dissolution of the Soviet Union some Eastern European nations _____.
Taya2010 [7]
To address problems caused by the dissolution of the Soviet Union some Eastern European nations privatized industry, increased foreign investment, and joined the European Union.

So answers are A), B), and E).
3 0
3 years ago
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How does metamorphic rocks change into sedimentary rocks
amm1812

Answer:

Weathering

Explanation:

Weathering is the process of breakdown of rocks through the action of wind, air, water and by the action of organisms. The metamorphic rocks get gradually converted into sedimentary rocks through this process. The big rocks change into small rock particles called sediments.

plz give brainliest

5 0
3 years ago
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