sound travels faster in air if the air isc old or warm.?
409027
Speed of sound is dependent on temperature. Speed of sound is directly proportional to the square root of pressure and inversely proportional to the square root of the density of the medium.\nv is proportional to P(pressure) and inversely proportional to D(density)\nP/D=RT/M    where R is the gas constant, T is the absolute temperature and M is the molecular mass.\n\nTherefore, Pressure is directly proportional to the absolute temperature of the gas.\nHence,\nv is directly proportional to the temperature.
1106678
Low speed. When it's going faster, it has a lot of it's own momentum spinning it around. \n\nIf you listen to a fan on low speed, you can hear the motor whine. \n\nI would guess.
117131
1,000000,0000000 that is how fast sound really is.\n\nbut to answer you question just listen and watch a jet after the jet passes then it takes 15 seconds before you here the sound because the jet has broken through the sound barrier.
1082681
The speed of sound actually varies depending on the medium through which the sound is traveling. The speed of sound varies directly with the number of degrees of freedom of each molecule in the gas and varies inversely with the molar mass of the gas.\n\nThe speed of sound in air is approximately 331.5 meters per second or 741.5 mph.
930735
Is the person next to you moving at the same speed as you?  If so you'll hear him fine.  If he's not moving at all then you'll never hear him, as the sound can't catch up to you.\n\nImagine another scenario to understand what I mean.  You're on an airplane which is stationary (say it's parked at the loading gate) and you're running down the corridor of the plane.  You can reach a maximum speed of 30 km/h.  Now, if the plane is moving at 300 km/h and you're running up the corridor, you're moving effectively at 330 km/h.  It's the same with the sound coming from your mouth.  If you're moving at a speed of X, when the sound comes out of your mouth, it's moving at a speed of X + roughly 350 m/s (the speed of sound).
86641
In my opinion, sure you can. You move as fast as sound, but doesnt mean that you hear as fast as you move.\nSay for instance you are in a car traveling 80mph and then you are walking with headphones on. SAme thing to me
492088
The speed of sound isn't even close to the speed of light. The speed of sound in air is usually given as 343 meters per second at sea level in air and the speed of light is approximately 3 X 10^8 meters per second (300,000,000 m/s)in a vaccuum.
616034
No. The enormous amount of heat produced by lightning expands air suddenly, causing the sound we refer to as thunder. The reason we don't always hear thunder (right away) is because light travels faster than sound. We don't always hear that sound because it might be very far away, but we still see the light.
16605
Both.  Warm air moves up (the molecules are spread out more) and cold air moves down.  If you are talking about warm fronts and cold fronts, they are moved by pressure systems.
628621
It is also called as "Directional Sound".\n\nYes, I've heard about it... Had even done a little study paper on it. If you need more info, send me an email.
37506
either sound, waves or air.
918965
Sounds like "speed" - check out the link below for more info. I hope this helps.
78979
None, sound is a wave not a particle. Sound is just a wave of vibrations travelling through atoms.
849466
Just listen very carefully, I can hear the air getting warmer around ur head right now.
706798
The sound energy is being dissipated uniformly in all directions.\nThe intensity of the sound energy decreases inversely to\nthe distance squared.\n\nSo from a location 78m versus 22m, the decrease in intensity\nis a factor of (22/78)^2.  And teh actual intenisty is then\n\n3x10^-4 x (22/78)^2.
314426
Hotter air rises when it is hotter than the air around it because it  it is less dense.Vise versa for cold air.
93697
LOL!  It does indeed!  It's surrounded by air.  Sound waves travel through air.