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If radio waves were used to communicate with an alien spaceship approaching Earth at 10% of the speed of light (c), Earth would receive their

If radio waves were used to communicate with an alien spaceship approaching Earth at 10% of the speed of light (c), Earth would receive their signals at a speed of: Group of answer choices 0.99c 0.1c 1.10c 0.9c 1.0c

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