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vaieri [72.5K]
3 years ago
5

Which situation is a result of human activities

Physics
1 answer:
Mila [183]3 years ago
7 0
I would answer but you have no choices lol

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vekshin1
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How the properties of sound waves change as they spread out in a spherical pattern
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How is thermal energy transferred during conduction? Check all that apply.
mel-nik [20]

Answer:

B, C, F

Explanation:

Conduction is heat transfer by means of molecular agitation within a material without any motion of the material as a whole. If one end of a metal rod is at a higher temperature, then energy will be transferred down the rod toward the colder end because the higher speed particles will collide with the slower ones with a net transfer of energy to the slower ones.

I would provide the source, but this is not allowed as it seems the website does not encourage learning of well-established materials.

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5 0
4 years ago
A pulley system operates with 40% efficiency. if the work put in is 200 joules, how much useful work is produced?
QveST [7]

<span>1.    </span><span>Efficiency is the measure of how efficient a process is. It is used to assess the ability of a process in avoiding waste energy, materials, money and time in doing a desirable output. It is calculated as;

Efficiency = useful energy ouput / total energy input</span>

<span>.40 = useful work / 200</span>

<span>useful work = 80 joules</span>

8 0
4 years ago
Read 2 more answers
2) Light reflects off of surfaces. It is also absorbed by opaque materials
Lunna [17]

Answer: B

White paper reflects some of the incoming waves,

while black absorbs all of the incoming waves.

Explanation:

Light is reflected off of white surfaces. Light is absorbed by opaque materials and transmitted through transparent objects. 

In the case of a white paper, a white paper can be considered as a translucent material in which some of the light incident on it bounces off while some pass through it. Therefore, we can conclude that White paper reflects some of the incoming waves,

while black absorbs all of the incoming waves.

6 0
3 years ago
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