The speed of a sound wave depends upon the medium through which it travels. In general, sound travels faster through solids than through liquids or gases. Also, the denser the medium, the slower sound will travel through it. The same sound will travel at a different speed on a cold day than it would on a warm day.
i think it's contact, dynamic, and regional
hope this helps
This is true I looked up in the science dictionary.
I do believe it's a recessive trait. I hope that helps
