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3 years ago

What were scientists studying when they made the first observations about the layers inside the Earth?

1 answer:

tatiyna3 years ago

4 0

Probably large earthquakes and how the seismic waves produces in such events are transmitted through the Earth gave the majority of information about the deep interior of the planet.

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What nevres carrys information from the hairs inside the cochlea?

Slav-nsk [51]

The cochlear nerve(also auditory or acoustic nerve)

5 0

4 years ago

Can someone help me with this plz??

cestrela7 [59]

Answer:

I dont know at all and that is confusing.

5 0

3 years ago

How many moles are in a 13.7g block of calcium?

goldenfox [79]

<h3>Answer:</h3>

0.342 mol Ca

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

13.7 g Ca

<u>Step 2: Identify Conversions</u>

Molar Mass of Ca - 40.08 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 13.7 \ g \ Ca(\frac{1 \ mol \ Ca}{40.08 \ g \ Ca})$
Multiply/Divide: $\displaystyle 0.341816 \ mol \ Ca$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 3 sig figs.</em>

0.341816 mol Ca ≈ 0.342 mol Ca

6 0

3 years ago

When discussing discordant and harmonious sound waves, which statement is false?

notka56 [123]

When discussing discordant and harmonious sound waves, the statement tat is false is : if the original waves combine to form irregular displacement of air, the sound will be discordant. The fact is, irregular displacement of air does not guarantee sound discordance

hope this helps

3 0

3 years ago

Iron displaces copper from a solution of a copper salt.The reaction is deemed as a redox reaction. Give reason.

mel-nik [20]

When the iron is not bonded to anything the oxidation number is 0 but when it is bonded to a nonmetal it will be positive. All reactions in which the oxidation number changes are considered redox.

3 0

3 years ago