Answer:
The answer is: <em>"Rarefactions"</em>
Explanation:
In a longitudinal wave, particles of the medium vibrate in a direction that is parallel to the direction that the wave travels. Places where particles of a medium crowd closer together are called compressions, and places where the particles spread farther apart are called rarefactions.
Answer:
C. H2SO4 I did the instruction
Well i know water is made out of 2 but gold is made of 1 type of atom if that helps
GASES because they are unseeeable and the electricity cant catch them