6
6
0
Posted in these groups: 
Skydiving
Skydiving
Posted 6 y ago
Responses: 3
2
2
0
2
2
0
LTC Stephen C.
SFC Ralph E Kelley, I always thought the same thing, but in reading about the speed of sound, I found this:
“In the Earth's atmosphere, the chief factor affecting the speed of sound is the temperature. For a given ideal gas with constant heat capacity and composition, the speed of sound is dependent solely upon temperature; see Details below. In such an ideal case, the effects of decreased density and decreased pressure of altitude cancel each other out, save for the residual effect of temperature.”
“By far the most important factor influencing the speed of sound in air is temperature. The speed is proportional to the square root of the absolute temperature, giving an increase of about 0.6 m/s per degree Celsius. For this reason, the pitch of a musical wind instrument increases as its temperature increases.”
The article about Baumgartner states that “he reached a top speed of 843.6 miles per hour, or Mach 1.25.”
I’ve included the “Speed of sound” article, which gets way too technical for me. Perhaps there are aspects that I’ve missed.
TSgt Joe C. Capt Daniel Goodman
https://en.m.wikipedia.org/wiki/Speed_of_sound
“In the Earth's atmosphere, the chief factor affecting the speed of sound is the temperature. For a given ideal gas with constant heat capacity and composition, the speed of sound is dependent solely upon temperature; see Details below. In such an ideal case, the effects of decreased density and decreased pressure of altitude cancel each other out, save for the residual effect of temperature.”
“By far the most important factor influencing the speed of sound in air is temperature. The speed is proportional to the square root of the absolute temperature, giving an increase of about 0.6 m/s per degree Celsius. For this reason, the pitch of a musical wind instrument increases as its temperature increases.”
The article about Baumgartner states that “he reached a top speed of 843.6 miles per hour, or Mach 1.25.”
I’ve included the “Speed of sound” article, which gets way too technical for me. Perhaps there are aspects that I’ve missed.
TSgt Joe C. Capt Daniel Goodman
https://en.m.wikipedia.org/wiki/Speed_of_sound
The speed of sound is the distance travelled per unit time by a sound wave as it propagates through an elastic medium. At 20C (68F), the speed of sound in air is about 343 metres per second (1,235 km/h; 1,125 ft/s; 767 mph; 667 kn), or a kilometre in 2.9 s or a mile in 4.7 s. It depends strongly on temperature, but also varies by several meters per second due to humidity and carbon dioxide.
(1)
(0)
1
1
0
I watched the event live, TSgt Joe C.! The jump took place on Sunday, so I was home and able to watch the event.
(1)
(0)
Read This Next
Continue with Facebook 
Continue with Google