Two sound waves are moving towards each other. a region of rarefaction overlaps with a region of rarefaction. which of the following choices correctly describes the behavior of sound waves when they overlap as described?
a. constructive interference; the amplitude increases but the volume remains the same.
b. destructive interference; the sound becomes quieter because the amplitude decreases.
c. constructive interference; the sound becomes louder because the amplitude increases.
d. destructive interference; the sound becomes louder because the amplitude increases.

"Destructive interference; the sound becomes quieter because the amplitude decreases" correctly describes the behavior of sound waves when they overlap as described.

Option B

Explanation:

At the point, when at least two sound waves from various sources are available simultaneously, they interface with each other or one to other to create another wave. The new wave is the aggregate of all the various waves. Wave association is called interference.

On the off chance that the compressions and the rarefaction of the two waves line up, they reinforce one another and make a wave with a higher force. This type/ kind of interference of wave is known constructive.

When the compressions and rarefactions are out of stage, their connection makes a wave with a hosed or lower force. This is destructive interference. At the point when waves are meddling with one another destructively, the sound is stronger in certain spots and gentler in others. Therefore, we hear heartbeats or pulsates in the sound.

if the thermos has a vacuum innner, then heat through conv currents and conduction are reduced = vacuum flask

double the distance = divide strength by 4