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mash [69]
3 years ago
15

How did scientist discover that earths outer core is liquid

Chemistry
1 answer:
liberstina [14]3 years ago
6 0

By studying seismic waves

Explanation:

Scientists discovered that the earth's outer core is liquid by simply studying seismic waves.

Seismic waves are elastic waves that have been used by geophysicists to study the earth's interior.

  • Interior of the earth is inaccessible due to high pressure and temperature conditions therein.
  • To study this part of the earth, an indirect method should be used.
  • Seismic waves produced during an earthquake due to their permeating nature have been used to study the interior.
  • Seismic P-waves can pass through any materials because they are longitudinal waves. They go through solids, liquids and gases.
  • S-waves can only pass through solids and not fluids.
  • On a seismograph, it was discovered that the S-waves were cut off in a part of the reading.
  • The waves re-appeared after a distance.
  • Since S-waves cannot pass through liquids, it has been hypothesized that the outer core is liquid.

learn more:

Mantle brainly.com/question/7623608

#learnwithBrainly

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How does intertia affect gymnastics
Olegator [25]
Inertia is resistance to changes in motion. Which means if you are at rest it takes an external force to get you moving. And once you are moving it takes an external force to change the direction of that motion. 

<span>For a person doing gymnastics the point that is subject to the above statement is her center of mass (roughly her belly button) . </span>

<span>So for example, once you launch into the air, gravity is the only significant force on you. It keeps you from traveling out into space by pulling you down and the trajectory of your belly button is a parabola. Now there is nothing you can do with your muscles (internal forces) to change that trajectory, even though you can do twists & turns about the center of mass. The height and range of the parabolic trajectory is determined by the angle & speed at which you initially launch yourself.
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</span><span>inertia is one of newtons laws of motion so an object in motion tends to remain in motion until another force acts upon it that is what newton said when you are doing a back hand spring it is easier to keep going then to stop
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Hope this helps!!! :D 
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6 0
3 years ago
How many moles are present in 1.75 g of zinc sulfate, Znso, ?
Cerrena [4.2K]

Explanation:

We assume you are converting between grams ZnSO4 and mole. You can view more details on each measurement unit: molecular weight of ZnSO4 or mol This compound is also known as Zinc Sulfate. The SI base unit for amount of substance is the mole. 1 grams ZnSO4 is equal to 0.0061941519772353 mole.

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3 years ago
Given 50.0 grams of Strontium, find grams of Phosphorus required for complete reaction
Sveta_85 [38]

Answer:

                     Mass = 11.78 g of P₄

Explanation:

                     The balance chemical equation is as follow:

                                          6 Sr + P4 → 2 Sr₃P₂

Step 1: Calculate moles of Sr as;

Moles = Mass / M/Mass

Moles = 50.0 g / 87.62 g/mol

Moles = 0.570 moles

Step 2: Find moles of P₄ as;

According to equation,

6 moles of Sr reacted with  =  1 mole of P₄

So,

0.570 moles of Sr will react with  =  X moles of P₄

Solving for X,

X = 1 mol × 0.570 mol / 6 mol

X = 0.0952 mol of P₄

Step 3: Calculate mass of P₄ as,

Mass = Moles × M.Mass

Mass = 0.0952 mol × 123.89 g/mol

Mass = 11.78 g of P₄

8 0
3 years ago
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Explanation:

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3 0
3 years ago
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The answer is c the indicator will have different colors in the different solutions
 
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