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After Pioneer 10 had left Neptune, it was used to test SETI. It was at a distance of 4.5x10⁹ km when it reached Neptune from Earth and used a transmitter with a 21 W output. What intensity was the radio signal?

After Pioneer 10 had left Neptune, it was used to test SETI. It was at a distance of 4.5x10⁹ km when it reached Neptune from Earth and used a transmitter with a 21 W output. What intensity was the radio signal?

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Example Problem After Pioneer 10 had left Neptune, it was used to test SETI. It was at a distance of 4.5x10⁹ km when it reached Neptune from Earth and used a transmitter with a 21 W output. What intensity was the radio signal?
Transcribed Image Text:Example Problem After Pioneer 10 had left Neptune, it was used to test SETI. It was at a distance of 4.5x10⁹ km when it reached Neptune from Earth and used a transmitter with a 21 W output. What intensity was the radio signal?
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