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Serjik [45]
3 years ago
11

What are two systems that use radio waves

Chemistry
1 answer:
Goshia [24]3 years ago
7 0
Mobile radio communication
Broadcasting
Navigation systems
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Which element will have the greatest attraction for the calcium electrons?
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What causes valley air to move up surrounding mountains during the day?
AleksandrR [38]

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so the third one

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