Why do astronaut need radio sets to communicate with each other in space...!
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Explanation:
Astronauts have devices in their helmets which transfer the sound waves from their voices into radio waves and transmit them to the ground (or other astronauts in space). This is how a radio at home works ��� radio waves are often thought to be a form of sound but they are not sound waves.
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Answer:
Because there is nothing out in space (like an atmosphere), the sound waves from one astronaut's whistling can't travel over to the other astronaut's ears. That's why the astronauts use radios to communicate—even if they're floating in space right next to each other!
Explanation:
Sound travels in air and there is no air in space
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