What causes compression and rarefaction?

Related questions

1. What compression algorithm does zip use?
2. How does parquet compression work?
3. How does a file get compressed?
4. What is bzip2 compression?
5. What is difference between lossy and lossless compression?
6. What is lossless image compression?
7. What is data compression techniques?
8. What are the compression techniques?
9. Why do people use lossless compression?
10. Is lossy or lossless compression better?

Tags

1. #opposite
2. #together
3. #compression
4. #pressed
5. #energy
6. #occurs
7. #expand
8. #space
9. #outward
10. #happens
11. #extra
12. #forced
13. #sound
14. #allowed
15. #given
16. #rarefaction
17. #source
18. #molecules
19. #travels
20. #kinetic
21. #other