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# An important news anouncement is transmitted by radio wavs to people who are 100 km away, sitting next to their radios, and by sound waves to people...

An important news anouncement is transmitted by radio wavs to people who are 100 km away, sitting next to their radios, and by sound waves to people sitting across the newsroom, 3.0 m from the newscaster. Who receives the news first? Take he speed of sound in air to be 343 m/s.

Dear Student, We have attached... View the full answer

Distance = 100 km = 10^5m
Speed of radio waves = 3* 10^8 m/s
Time taken = 10^5/(3*10^8) = 1/3000 s = 3.33 x 10 ^ -4 s
For announcement by newsroom:
D=3m
Speed of sound = 343 m/s
Time...

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