whats the speed of sound?
925754
At sea level, at a temperature of 21 °C (70 °F) and under normal atmospheric conditions, the speed of sound is 344 m/s (1238 km/h or 770 mph).
41729
Sight. The speed of light, that's what people say to describe something very fast. Have you heard people say the speed of sound instead? I haven't.
758612
Sound waves are longitudinal waves. They vibrate back and forth in the direction that they aremoving. Sound travels at about 1100 feet /sec.\n\nLight waves are transverse waves, part of the electromagnetic spectrum. they vibrate up and down similar to water waves. They travel at 186,000 miles/sec.
1121807
Sound travel in air with a speed of 331.4 m/s. For sound to travel from the student to the wall and back it must travel 165*2=330 m.  For sound to travel 330 m , it will take approximately 330/331.4=..9958s.
1093017
Your question is incomplete, part of it looks to be cut off.\n\nThis is just a guess, but the question almost seems like it is asking how long after the student claps his hands does he hear the eco bounce back off the wall.\nIn this case, one would need to know the speed of sound (or one could just estimate it to be about 340.29 m/s).\nSince speed is given as distance traveled per unit time, one can calculate the amount of time it would take something traveling at a given speed to be the distance traveled divided by the speed.  In this case with the sound, the sound traveled to the wall (165 meters) and back again (another 165 meters), for a total distance of 330 meters.
788507
If you have a video camera and good editing software (iMovie), you can measure the speed of sound. Have a friend set off a firecracker a long distance away, and tape it. Then count the number of frames between the flash and the bang.
386222
sound is particles vibrating in succesion. waves. \nthere are more particles in iron so the sound is trasnfered faster.
771800
A good approximation is the speed of sound is 331.5 + 0.6 * T.  T is the temperature in Celsius.  The answer is in metres per second.  Using this formula, the speed of sound at 25 degrees Celsius is 346.5 m/s.
719322
Sound is usually measured in decibels
1186594
The speed of sound in air depends on the temperature of air, and the composition of the air (different amounts of gases or water vapor present ).\nAt 0 degrees Celsius (freezing point), the speed of sound in regular dry atmospheric air is 331.4 meters/second (or 742 miles per hour).\nAt 22 degrees Celsius (71 degrees F), the speed of sound is 344 m/s (772 mph).\nAt 100 degrees C (boiling point), the speed of sound is 392 m/s (878 mph).\nYou can use the link to calculate the speed of sound for any temperature.
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.
44306
If we consider the atmosphere on a standard day at sea level static conditions, the speed of sound is about 761 mph.
789953
Measure the speed of sound by help of an echo, a stopwatch and a tape-measure. (depending on temperature it is about 430 m/s.\nRepeat your measurements at least 10x and have the average.\nGood luck\n\nTh
345286
The speed of sound v in dry air at temperature T (in celsius) is given by:\n\nv = (331.4 + 0.6 T) m/s\n\nSpeed of sound depends on various factors, such as, temperature, humidity, density, etc. of the medium in which it travels.\n \nThe following links provide the speed of sound calculators and related links:
34154
sound travels at an avg speed of .78999342 mps or 2843.9763 MPH in seawater depending on water temperature salinity and depth of the source/receiver.\n\nlight averages 186,282 mps or 11,176,920 mph\n\nthe other answers AREN'T WRONG but you should have specified through what medium they are traveling. also you need to specify temperature humidity pressure altitude/depth salinity and or a myriad of other factors\n\nLight has a different speed when passing through our atmosphere than it does through space just as sound through air and water or a solid. the more dense the material the faster the sound transmission. oddly the opposite is true for light.\n\nthis question has been asked several times before.  if you do a search for previous questions you will doubtless find MANY other answers for these very questions with more precise speeds through different mediums.
339050
The speed of light in a vacuum is exactly 299,792,458 metres per second (or 1,079,252,848.8  km·h-1, which is approximately 186,282.397 miles per second, or 670,616,629.4 miles per hour). This value is denoted by the letter c, reputedly from the Latin celeritas, "speed". Note that this speed is a definition, not a measurement, since the fundamental SI unit of distance, the metre, has been defined since 1983 in terms of the speed of light—one metre is the distance light travels in a vacuum in 1/299,792,458 of a second. The speed of light through a transparent medium (that is, not in vacuum) is less than c; the ratio of c to this speed is called the refractive index of the medium.
685470
the speed = distance/time