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olga nikolaevna [1]
2 years ago
11

What current is used to power the Untied States power grid? O alternating current O direct current​

Physics
2 answers:
QveST [7]2 years ago
4 0

Answer:

alternating

Explanation:

it was right on my quiz

Alina [70]2 years ago
3 0

Answer:

Alternating

Explanation:

It is alternating because it is easy to distribute long distance.

Direct current is found in batteries and have large voltage drop over distance.

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How much energy is needed to generate 0.71 x 10-16 kg of mass?
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Answer:

6.39 J of energy is needed to generate 0.71 * 10⁻¹⁶ kg mass

Explanation:

According to the Equation: E = mc²

where the mass, m = 0.71 * 10⁻¹⁶ kg

the speed of light, c = 3 * 10⁸ m/s

The amount of energy needed to generate a mass of 0.71 * 10⁻¹⁶ kg is calculated as follows:

E = (0.71 * 10⁻¹⁶) (3 * 10⁸)²

E = 0.71 * 10⁻¹⁶ * 9 * 10¹⁶

E = 0.71 * 9

E = 6.39 J

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