If vm is the speed of sound in moist air and vd is the speed of sound in dry air under identical conditions of pressure and temperature, then:
![A ring of water vapor is created as pilots Lt. Justin Halligan (L) and Lt. Michael Witt (R) fly their F/A-18F Super Hornet airplane within 200mph of breaking the sound barrier while A ring of water vapor is created as pilots Lt. Justin Halligan (L) and Lt. Michael Witt (R) fly their F/A-18F Super Hornet airplane within 200mph of breaking the sound barrier while](https://c8.alamy.com/comp/2D22HT7/a-ring-of-water-vapor-is-created-as-pilots-lt-justin-halligan-l-and-lt-michael-witt-r-fly-their-fa-18f-super-hornet-airplane-within-200mph-of-breaking-the-sound-barrier-while-performing-at-new-york-air-show-at-jones-beach-in-wantagh-new-york-may-23-2009-the-phenomenon-is-created-when-the-plane-travelling-at-low-altitudes-over-water-approaches-the-speed-of-sound-and-the-pressure-created-by-the-forward-sound-waves-squeezes-moisture-in-the-air-to-form-a-ball-of-cloud-over-the-front-of-the-aircraft-6-of-11-reuterschristopher-pasatieri-united-states-transport-military-sci-tec-2D22HT7.jpg)
A ring of water vapor is created as pilots Lt. Justin Halligan (L) and Lt. Michael Witt (R) fly their F/A-18F Super Hornet airplane within 200mph of breaking the sound barrier while
![Speed of sound waves in air a) is independent of temperature b) increases with pressure c) increases with increase in humidity d) decreases with increase in humidity. Speed of sound waves in air a) is independent of temperature b) increases with pressure c) increases with increase in humidity d) decreases with increase in humidity.](https://d10lpgp6xz60nq.cloudfront.net/web-thumb/642749816_web.png)
Speed of sound waves in air a) is independent of temperature b) increases with pressure c) increases with increase in humidity d) decreases with increase in humidity.
![Speed of sound vs. temperature and relative humidity according to [2],... | Download Scientific Diagram Speed of sound vs. temperature and relative humidity according to [2],... | Download Scientific Diagram](https://www.researchgate.net/profile/Cornelis-Van-Der-Geld/publication/51873087/figure/fig1/AS:214156205662208@1428070226228/Speed-of-sound-vs-temperature-and-relative-humidity-according-to-2-p-1013-kPa-314_Q320.jpg)