If the number of particles is low in an upper layer, why can sound propagation be weak there?
Answer and explanation
Correct answer: Because sound needs particles of a medium
Sound is a mechanical wave, so its propagation depends on particles of a material medium oscillating and transferring energy to neighbouring particles. In a very thin upper-atmospheric layer, particles are widely separated and collisions are infrequent; energy transfer is consequently inefficient and sound becomes weak. Option A states this principle. Sound does not require ozone specifically, does not form only over oceans, and cannot eliminate gravity.
Frequently asked questions
What is the correct answer to this question?
Because sound needs particles of a medium
Why is this the correct answer?
Sound is a mechanical wave, so its propagation depends on particles of a material medium oscillating and transferring energy to neighbouring particles. In a very thin upper-atmospheric layer, particles are widely separated and collisions are infrequent; energy transfer is consequently inefficient and sound becomes weak. Option A states this principle. Sound does not require ozone specifically, does not form only over oceans, and cannot eliminate gravity.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Introduction to Accounting. Topic: Accounting Information.
