What are the problems with studying the structure of the earth?

Answers

Answer 1
Answer: well we are not able to see the internal structure of the Earth directly because we can't get at it! The thinnest crust is under the oceans but even that is around 7kms thick, way deeper than we can drill. We have to use indirect methods like earthquakes, and infer the structure from the way the pressure and shear waves produced travel through the Earth. 

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Which element is likely to have the highest thermal conductivity

Answers

Gallium, due to its metal properties, which tend to conduct electricity and heat quite well. 

Your answer is: Galium

For elements to maintain a neutral charge, which two particles must have equal numbers? (2 points) electrons and protons ions and electrons neutrons and ions protons and neutrons

Answers

Answer: Option (a) is the correct answer.

Explanation:

In order to maintain a neutral charge the number of protons must be equal to the number of electrons.

For example, in a neutral carbon atom the atomic number or number of protons is 6. Also, number of electrons present in carbon atom will be 6.

Thus, we can conclude that out of the given options for elements to maintain a neutral charge number of electrons and protons must be equal.

How many moles of PCl5 can be produced from 24.0 g of P4

Answers

Hey there!

Given the reaction:

P4 + 10 Cl2  ------------------ 4 PCl5

Molar mass P4 = 124 g/mol

Number of moles P4:

n = mass of solute / molar mass

n = 24.0 / 124

n = 0.1935  moles of P4

Therefore:

1 mole P4 --------------- 4 moles PCl5

0.1935 moles P4 ------- moles PCl5

moles PCl5 = 0.1935 * 4

= 0.774 moles of PCl5

Hope that helps!

Would you use sandstone or slate for building

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sandstone, but it would be easier to break
Sandstone because slake is not as good to use when building and sandstone is like brik so it fits and is stronger than slake

Which process transfers heat when particles collide in a solid

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The correct answer is conduction. Radiation involves heat moving through space (I think as light but I could be wrong) and convection involves heat transferring through the movement of a fluid such as gas or liquid.

I hope his helps.  Let me know in the comments if anything is unclear.

Which of the following are also major levels of classification?Choose all answers that are correct.

A.Genus

B.Species

C.Group

Answers

The answer is A and B.  kingdom, phylum, class, order, family, genus and species.

Answer:

A and B

Explanation:

hope I helped