I've read the speed of sound is 330 and 340m/s, but which one is right?
466291
The speed of sound varies depending on the material it is travelling through, the pressure, altitude and temperature.\n\nOn the assumption you're talking about air and that you're at sea level under normal atmospheric conditions then 340m/s would be the speed at 14 degrees C and 330m/s would be the speed at minus 1 degree C - so they're both right.
4004
lambda =velocity/freq\n       =360/10\n       =36 m.\n\nb)1/10 secs.
82505
First, you need to find the wavelength of the frequency.\nSpeed=Wavelegth*frequency\nWavelength= 342 m/s / 440 1/s =.78 meters\n\nThe wave traveling into the tube will hit its first resonance frequency one quarter of the way along the wave.  This is the first spot where that wave travels into the tube at such an angle that when it bounces off the water, it can escape the tube again; that is what creates the "resonance" or the louder vibrating sound.  So the first resonance would be @ .78m/4=.19m ; the second @ .19*2=.39m ; and the third at .19*3=.58 meters.
693965
If it is open on both ends, the harmonic frequencies are:\n\nf=nv/2L\n\nwhere n is the harmonic number (1st, 2nd, etc), v is the speed of sound in air (~343 m/s), and L is the length of the pipe.
594641
since the humidity is low, It is reasonable to neglect the humidity factor since the T is same the speed of sound can also taken as constant.\nspeed = distance by time\ntherefore time = 400 / 343 s.\n               = 1.16610875801749 s.
289044
The frequency range is generally accepted to be 20 Hz to 20,000 Hz. With the speed of sound = 334 m/s, 20 Hz has a wavelength of 16.7 m, 20,000 Hz a wavelength of 16.7 mm. (Ubergeek, the answerer in your link slipped a decimal place.)
440638
341m/s but it changes according to the weather conditions in humid climate it is faster as compared to dry.and yeah sound does not travel through vacuum\nspeed of sound in solids > liquids > gases
371210
3 * 10^8 m/s (approx.- this is used for the purpose of calculations)\nthe exact value is hard to calculate but the closest approximation is 299,792,458 m/s
815604
I suppose you need the speed:\nThe required fraction is : 392/s ft/s\n                                      = 49ft/s (simplified)\nThe speed is 49 fett per second.
1097080
a)\n\n(change in frequency)/(recorded frequency) = (Speed of emitter)/(wave speed).\n\nChange in frequency = 22 Hz\nRecorded frequency = 820 Hz\nSpeed of emitter = what you are trying to find.\nWave speed = speed of sound = 340 m/s\n\n(22 / 820) x 340 = 9.12 m/s\n\nb)\n\nThe frequency of the echo is (I'm guessing for this one sorry) double the regular frequency, which is 1684 Hz.\n\nc) \n\nThe frequency heard by the man is 820 Hz by definition isn't it? Thats the frequency as the boy passes anyway.\n\n[EDIT] Wait I just realised your whole question makes no sense. Due to the limited info in the question I was assuming you meant it falls to 820 Hz from the emission frequency at the point where the boy passes the man. But why would the frequency fall? The point where the boy passes the man is the point where the frequency experienced by the man is highest.\n\nOh well I hope my answer helped a bit anyway.
231096
6 meters per second\n\n360 meters per minute\n\n21,600 meters per hour
44625
The speed of sound (at sea level) approximately is 340.29 m/s and can be used as a global estimate for the speed of sound for the purposes of this calculation.  That would mean that students measuring such a sound would need to be seperated by 340 meters to measure even a 1 second delay in sound propagation.  Additionally they would need to be able to perfectly synchronize the start of the sound event and the start of stopwatch event.  Making it even worse is the need to react with enough speed to stop the stopwatch upon reciept of the signal without significant reaction delay.\n\nThe experiment would be simply to accomplish with resources to control synchronization and detection equipment, but it would not be a low-budget, high-school type of experiment.
944667
Electromagnetic waves travel at the speed of 300,000 km/s.  Just divide your distance by that speed.
269338
The speed of light is 3 x 10^10 cm/sec or 3 x 10^8 m/sec or 3 x 10^5 km/sec.\n\nWavelength = speed of light / frequency\n\nBe sure you use the right units.
222515
200 inches per second (or 500 cmps)
944786
Well. \n\nHow fast does sound travel in three seconds?\n\n3x 340 m/s = 1020 m. I thought that was \na little fast, but I could be wrong.\n\nLight travels way faster than that, so you pretty\nmuch see the lightning right when it happens.\n\nSo the event occurs 1020 meters away.
887565
Sound travels at different speeds depending on what it is traveling through. Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solids. Temperature also affects the speed of sound. \nGases: \n\nThe speed of sound depends upon the properties of the medium it is passing through. When we look at the properties of a gas, we see that only when molecules collide with each other can the condensations and rarefactions of a sound wave move about. So, it makes sense that the speed of sound has the same order of magnitude as the average molecular speed between collisions. In a gas, it is particularly important to know the temperature. This is because at lower temperatures, molecules collide more often, giving the sound wave more chances to move around rapidly. At freezing (0º Celcius), sound travels through air at 331 meters per second (about 740 mph). But, at 20ºC, room temperature, sound travels at 343 meters per second (767 mph). \n\nLiquids: \n\nSound travels faster in liquids than in gases because molecules are more tightly packed. In fresh water, sound waves travel at 1,482 meters per second (about 3,315 mph). That's well over 4 times faster than in air! Several ocean-dwelling animals rely upon sound waves to communicate with other animals and to locate food and obstacles. The reason that they are able to effectively use this method of communication over long distances is that sound travels so much faster in water.\n\nSolids: \n\nSound travels fastest through solids. This is because molecules in a solid medium are much closer together than those in a liquid or gas, allowing sound waves to travel more quickly through it. In fact, sound waves travel over 17 times faster through steel than through air. The exact speed of sound in steel is 5,960 meters per second (13,332 mph)! But, this is only for the majority of solids. The speed of sound in all solids are not faster than in all liquids