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frutty [35]
3 years ago
15

Electricity and magnetism are? Regulated by one force with positive and negative charges Two separate forces Both of the above

Physics
1 answer:
Anarel [89]3 years ago
5 0

Answer:

two separate forces

Explanation:

Electricity and magnetism are two separate forces. However, they come together in a field called electromagnetism. Both types of forces are linked; a moving magnet may push electric charges and trigger electric current. Objects which have both positive and negative charges are mutually repulsive to each other, and those with opposite charges are mutually attractive.

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Electrons are ejected from sodium metal by any light that has a wavelength shorter than 544 nm. What is the kinetic energy of an
wel

Answer:

KE=2.3 x 10⁻¹⁹ J

Explanation:

Given that

λ = 544 nm

λ' = 485 nm

The kinetic energy KE given as

KE= E - Ф

Where

E=\dfrac{hC}{\lambda'}

\phi=\dfrac{hC}{\lambda}

h= 6.626 x 10⁻³⁴

C=3 x 10⁸ m/s

Now by putting the values

KE=\dfrac{hC}{\lambda'}-\dfrac{hC}{\lambda}

KE=\dfrac{34.34\times 10^{-34}\times 3\times 10^8}{485\times 10^{-9}}- \dfrac{34.34\times 10^{-34}\times 3\times 10^8}{544\times 10^{-9}}

KE=2.3 x 10⁻¹⁹ J

This is kinetic energy.

6 0
3 years ago
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Brut [27]

Answer:

100 percent

Explanation:

Relative humidity is the water-vapour content of the air relative to its content at saturation. Saturated air, for example, has a relative humidity of 100 percent, and near the Earth the relative humidity very rarely falls below 30 percent.

3 0
3 years ago
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klio [65]
<h2>True</h2>

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The correct answer is A
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salantis [7]
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7 0
3 years ago
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