Discussion
Assertion (A): A Mach wave may be treated as isentropic while a finite shock may not.
Reason (R): The property changes across a Mach wave are infinitesimal, so the entropy rise is of second order.
Select the correct answer from the options below.
Answer: C
Both statements are true and the second explains the first. Entropy rise across a wave scales with the cube of its strength, so for a vanishingly weak wave it is negligible. This is why expansion fans, built from Mach waves, are isentropic while compression shocks of finite strength are not.
No comment is present. Be the first to comment.
Loading…
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development