| 11. | They were eventually able to bounce 20 radio signals off the moon.
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| 12. | Laughlin also receives television and radio signals that broadcast from Las Vegas.
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| 13. | Interference from the radio signals the headsets generate can sometimes complicate things.
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| 14. | All of that electric power was expended in the one radio signal.
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| 15. | Using radio signals, it directly measures the electrical activity of the heart.
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| 16. | Even a two-way radio signal between clearers can set off cluster bomblets.
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| 17. | Radio signals reaching Earth from faraway galaxies are feeble, often barely discernible.
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| 18. | Now a Satellite Radio Signal Follows You From Car to House
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| 19. | And Cassiopeia A gives off a whole lot of radio signals.
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| 20. | Continuous radio signals from those satellites are used widely for navigation.
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