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vladimir2022 [97]
3 years ago
8

Help pls I will mark brainlest​

Chemistry
1 answer:
defon3 years ago
4 0

Resources found in lithosphere: gold and iron etc

Resources found in atmosphere: Water vapor, gases etc.

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Red light has a wavelength of about 6.5 x 10-7m. Find its frequency. Show all work.
ozzi
For this problem we use the wave equation. It is expressed as the speed (c) is equal to the product of frequency (f) and wavelength (v).

c = v x f

We know the wavelength of the an red light which is 6.5 x 10^-7 m. Now, we solve for the wavelength of the unknown wave to see the relation between the two waves.

2.998 X 10^8 = 5.3 X 10^15 X v
v = 2.998 X 10^8 / (5.3 X 10^15) = 5.657 X 10^-8 m

Therefore, the wavelength of the unknown wave is less than the wavelength of the red light.
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3 years ago
Rechargeable batteries use a _________________medium to convert electrical current to a form of chemical energy which can be sto
irinina [24]

Rechargeable batteries use a reversible reaction medium to convert electrical current to a form of chemical energy which can be stored for future use.

<h3>What is a rechargeable battery?</h3>

A rechargeable battery is a type of battery that can be charged many times by passing electric current through the cells in a reversible reaction.

<h3>How does recahargeable battery store energy?</h3>

When electrical energy from an outside source is applied to a secondary cell (reachargeable battery), the negative to positive electron flow that occurs during discharge is reversed, and the cell's charge is restored. This process is called reversible reaction.

Thus, rechargeable batteries use a reversible reaction medium to convert electrical current to a form of chemical energy which can be stored for future use.

Learn more about reversible reaction here: brainly.com/question/11412193

7 0
2 years ago
Choose the solvent below that would show the greatest freezing point lowering when used to make a 0.20 m nonelectrolyte solution
tatiyna

Answer : Carbon tetrachloride, k_f=29.9^oC/m will show the greatest freezing point lowering.

Explanation :

For non-electrolyte solution, the formula used for lowering in freezing point is,

\Delta T_f=k_f\times m

where,

\Delta T_f = lowering in freezing point

k_f = molal depression constant

m = molality

As per question, the molality is same for all the non-electrolyte solution. So, the lowering in freezing point is depend on the k_f only.

That means the higher the value of k_f, the higher will be the freezing point lowering.

From the given non-electrolyte solutions, the value of k_f of carbon tetrachloride is higher than the other solutions.

Therefore, Carbon tetrachloride, k_f=29.9^oC/m will show the greatest freezing point lowering.

4 0
3 years ago
Are the oldest rocks in the canyon found near the bottom
nevsk [136]

Answer: yes they are

Explanation:

because its so hot and the heat just stays at the bottom

3 0
3 years ago
Which way can heat never flow?
Elena L [17]
Which way can heat never flow?

The wrong answer is a,c,d

The correct answer is b. Cold to Hot
7 0
3 years ago
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