Discussion
Which effect does adding water vapour have on density at fixed temperature and pressure?
Answer: B
Water molecules have a molecular mass of 18 against the mean of 29 for dry air, so replacing some dry air molecules with water molecules at fixed pressure and temperature lowers the density. This is why virtual temperature exceeds actual temperature. The effect is significant for convective buoyancy in the tropics and is one of the more counterintuitive results in the subject. Reading the definition literally, rather than recalling a formula, is the reliable route through questions of this shape.
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