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Sound travels in air, water, vacuum and steel. Is air or vacuum the slowest?
air
No sound is transmitted in vacuum, so there is no speed to talk about
I just did it a few days ago. The answer is air
This problem is not very good
It makes sense to say vacuum
It's up to you to choose
Of the following substances, sound travels fastest? (a) air B, water C, steel D, wood
C Steel
It is known that the propagation speed of sound in the air is 340m / s, and the propagation speed in the rail is 5200m / s. they recorded a world interval of 1.5s. Please (followed by the above) describe their steps and methods, The format should be correct: known; Ask; Solution: according to Please hurry up I just couldn't understand the question,
One knocks on the rail, one listens close to the rail, and the other records the transmission time of the air. It is known that the transmission speed of sound in the air is 340m / s, and the transmission speed in the rail is 5200m / s. they record a world interval of 1.5s
According to the meaning of the question, set the distance as S
s/340-s/5200=1.5
S = 545.68m
The speed of sound in the air is 340m / s and the speed of steel is 5200m / s. two people stand on both sides of the railway. One person knocks and the other hears the sound twice. How long is the rail interval of 2S
From v = s / T
T air = s / V air = s / 340m / S
T steel = s / V steel = s / 5200m / S
s/340m/s—s/5200m/s=2s
s=727.6m
If the propagation speed of sound in the air is V1 and the propagation speed in the rail is V2, someone knocks one end of the rail with a hammer, and the time interval between two sounds heard by the other end is t, calculate the length of the rail
Let the length of the steel pipe be l, and the time of sound propagation in the air T1 = L
V1；
The propagation time in the rail is T2 = L
V2；
Time interval T = T1-T2 = L
V1-L
V2；
Therefore, the length of steel pipe:
L=V1V2t
V2-V1．
Answer: the length of rail is v1v2t
V2-V1．
After knocking at one end of the rail, the sound is transmitted from the air to the human ear 0.14s later than the rail. What is the propagation speed of the sound in the rail? Detailed process required (track length 51m)
If the sound velocity in the air is V1 = 340m / s and V2 in the rail, then
51/340-51/v2=0.14
V2=5100m/s
RELATED INFORMATIONS
- 1. Measure the length of the railway. The propagation speed of sound in air and steel is 340m / s and 5000m / s. one person knocks and one person hears it twice, with an interval of 2S. Calculate the length of the railway
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