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Your friend Nader is standing 400,000 meters away. If you send a message to him using radio waves, how long will it take for him to receive it? Round to four decimal places.
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Your friend Nader is standing 400,000 meters away. If you send a message to him using radio waves, how long will it take for him to receive it? Round to four decimal places.

User Xtreak
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speed of a radio wave in vacuum/air is 3x10^8 m/s. so, if speed is also distance/time, then time = distance/speed = 400,000/300,000,000 = ????
User Abhishek Gupta
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