Which of these devices does NOT contain a magnet or electromagnet?

A. an electric motor
B. a doorbell
C. a telephone
D. a light bulb

Answers

Answer 1
i think it is D a light bulb
Answer 2
The answer is D.
A lightbulb has no magnet or electromagnet.

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Nitrogen gets returned to the atmosphere through

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Answer:

nitrogen fixation ........

the activity of organisms known as decomposers. Some bacteria are decomposers and break down the complex nitrogen compounds in dead organisms and animal wastes. This returns simple nitrogen compounds to the soil where they can be used by plants to produce more nitrates.
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