An important news announcement is transmitted by radio waves to people who are 46 km away, sitting next to their radios, and by sound waves to people sitting across the newsroom, 2.1 m from the newscaster. Take the speed of sound in air to be 348 m/s. What is the difference in time that the message is received

Explanation:

Radio waves travel at the speed of light

= Speed of light =

= Distance between two radios = 46 km

= Speed of sound in air = 348 m/s

= Distance sound travels across the newsroom = 2.1 m

Time taken by the radio signal to reach the required location is

Time taken by sound to reach the required location is

The time difference is

The difference in time that the message is received is .

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