Respuesta :
The difference between the second and first sound waves is best described by the sound that is louder because the air molecules in the compressions of the second wave are denser. Option 3 is correct.
What is a sound wave?
A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.
The complete question is;
"Noah and Nina are 15 m apart in a closed room. Noah says the same sentence twice. The first time, Nina does not hear the sound, but she does hear the sentence the second time.
What best describes the difference between the second sound wave and the first?
1. The second sound wave reflects off the walls of the room, so Nina is able to hear the sound.
2. The second sound wave travels faster to Nina, so less energy is dissipated through the air.
3. The air molecules in the compressions of the the second wave are denser, so the sound is louder
4. The air molecules in the second wave are spaced evenly, so a high-frequency wave is produced.'
Noah repeats a phrase twice. Nina does not hear the sound the first time, but she does hear the statement the second.
The difference between the second and first sound waves is best described by the sound that is louder because the air molecules in the compressions of the second wave are denser.
Hence option 3 is correct.
To learn more about the sound wave refer to;
https://brainly.com/question/11797560
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