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sineoko [7]
2 years ago
15

How do waves form?

Chemistry
1 answer:
mrs_skeptik [129]2 years ago
3 0

Answer:

It's the 4th one. waves are created by the wind

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Which ecosystem is the least stable?
Softa [21]

Answer:

tundra bc it has barley any food source and has vary little inhabitants

Explanation:

6 0
3 years ago
The area surrounding the Pacific Ocean is often referred to as the ring of Firee due to the concentration of geologic events. De
viva [34]

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The amount of movement of tectonic plates in the area

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The population density vary across the countries

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5 0
3 years ago
Select the correct answer from the drop-down menu. a scientist digs up sample of arctic ice that is 458,000 years old. he takes
Jlenok [28]

The original mass of krypton 81 that is present in the ice is 6.70 grams.

<h3>How do we calculate original mass?</h3>

Original mass of any substance will be calculated as below for the decomposition reaction is:

N = N₀(1/2)ⁿ, where

N = remaining mass of krypton-81 = 1.675g

N₀ = original mass of krypton-81 = ?

n will be calculated as:
n = T/t, where

T = total time period = 458,000 years

t = half life time = 229,000 years

n = 458,000/229,000 = 2

Now putting all these values on the above equation, we get

N₀ = 1.675 / (1/2)²

N₀ = 6.70 g

Hence required mass is 6.70 g.

To know more about half life time, visit the below link:
brainly.com/question/2320811

8 0
2 years ago
Whats the answer????
Lena [83]

Answer:

im trynna find it out to mamasss

Explanation:

5 0
2 years ago
Which one of these samples contains the smallest number of molecule?
erma4kov [3.2K]

Answer:

E) 1.0L of He at STP

Explanation:

8 0
3 years ago
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