The correct answer is D.
Echo refers to the sound that is heard when a sound wave is reflected back from a surface. An echo sound is made when a sound wave traveled through the air, hit a hard surface and get reflected back. Generally, hard surfaces reflect sound wave while soft surfaces absorb sound waves. Reflected sound waves are used in application of some devices that are used in range and direction finding.
Answer:
A reaction in which one element replaces another element in a compound.
Answer:
theirs a $50 tax with the income hes making
Explanation:
Answer:
A more dense plate going underneath a less dense plate.
