an investigator notes that sound cannot travel through a device in the lab. what is a reasonable conclusion…

an investigator notes that sound cannot travel through a device in the lab. what is a reasonable conclusion based on these results? a there is a vacuum within the device. b the air in the device is too dense for sound to move through. c the device contains liquids, which sound cannot move through. d the device contains a chemical that stops sound waves.
Answer
Answer:
A. There is a vacuum within the device.
Brief Explanations:
Sound requires a medium to travel. In a vacuum, there are no particles for sound waves to vibrate through, so sound cannot travel. Other options are incorrect as sound can travel through air (if not too dense), liquids, and there's no common chemical that completely stops sound waves in the context of this basic physics - related question.