GK
PHYSICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Sound frequency (cps)
|
|
|
Ambient temperature
|
|
|
Barometric pressure
|
|
|
None of the above
|
Detailed explanation-1: -Sound travels faster in hotter air as high energy air molecules carry the sound more quickly.
Detailed explanation-2: -In the lower atmosphere, variations in the speed of sound with altitude are dominated by temperature and wind speed changes; the vibrational and rotational relaxation frequencies, which depend on the ratio of frequency to pressure (f/P), are in the kilohertz to megahertz range.
Detailed explanation-3: -Molecules at higher temperatures have more energy and can vibrate faster and allow sound waves to travel more quickly. The speed of sound at room temperature air is 346 meters per second. This is faster than 331 meters per second, which is the speed of sound in air at freezing temperatures.
Detailed explanation-4: -The speed of sound in a medium is determined by a combination of the medium’s rigidity (or compressibility in gases) and its density. The more rigid (or less compressible) the medium, the faster the speed of sound. The greater the density of a medium, the slower the speed of sound.