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ladessa [460]
3 years ago
12

How dose an atom become an ion with a -2 charge?

Physics
1 answer:
Aloiza [94]3 years ago
6 0
A atom can become an ion with a -2 charge, if it gains 2 electrons during a chemical reaction.
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A wind turbine has a total input power of 2 500 kW.
Sonbull [250]

Answer:

Output power = 500 KW

Explanation:

Given the following data;

Efficiency = 20%

Input power = 2500 KW

To find the output power;

Efficiency = \frac {Out-put \; power}{In-put \; power} * 100

Substituting into the equation, we have;

LET Output power = OP

20 = \frac {OP}{2500} * 100

Cross-multiplying, we have;

20 * 2500 = OP * 100

50000 = OP * 100

OP = \frac {50000}{100}

Output power = 500 KW

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Answer: Option A : Technician A

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