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Elena-2011 [213]
3 years ago
9

What type of electromagnetic radiation is used in communications devices such as cellular telephones?

Physics
1 answer:
Mumz [18]3 years ago
6 0
Radio waves is the type of electromagnetic radiation, which is used in communication devices such as cellular telephones.
<span>Electromagnetic radiations are of many types which includes: Radio, Microwave, Infrared, Visible, Ultraviolet, X-rays and gamma rays, in which electric and magnetic field vary simultaneously. These rays or radiations are classified by wavelength.

</span>
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When the mass of one object doubles what happens to its gravitational attraction to another object of constant mass, assuming th
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Gravitational force will become two times.

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3 years ago
You fill two balloons with gas, one with hydrogen and one with carbon dioxide. You hold a match to each balloon. The hydrogen ba
miv72 [106K]

Answer:E. Hydrogen was able to participate in an exergonic reaction and carbon dioxide couldn't

Explanation:

An exergonic reaction releases energy to the environment. The combustion of hydrogen contained in the balloon is a chemical reaction. The reaction can take place because hydrogen combines with oxygen in air, that is, the gas is combustible. CO2 does not support combustion, it does not combine with oxygen in air and it is also denser than air, hence does not participate in the exergonic reaction.

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3 years ago
An apple falls out of a tree from a height of 2.3m. what is the impact speed of the apple
Anuta_ua [19.1K]

Answer:6.71 m/s

Explanation:

Given

Apple fall from a height of h=2.3 m  

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Assuming initial velocity to be zero

substituting the value we get

v^2-0=2\times 9.8\times 2.3  

v=\sqrt{2\times 9.8\times 2.3}  

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5 0
3 years ago
A 6000 kg roller coaster goes around a loop of radius 30 m at 6 m/s. What is the centripetal acceleration?
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The answer to the question is 7200

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3 years ago
Which law states that absolute zero cannot be reached?
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The third law of thermodynamics,the principle of temperature.

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This means that it is impossible to cool down a perfect 0 or absolute 0(-273.15 C)
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3 years ago
Read 2 more answers
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