What is the speed of sound in a vacuum?

140 m/s
zero
120 m/s
1400 m/s
The speed of sound in a vacuum is zero meters per second, as sound cannot travel in a vacuum. Sound is a wave, which means it spreads through the vibration of particles in a medium, such as water or air. Since a vacuum is empty space, there is no medium for the sound to travel through. The speed of sound in air mainly depends on the temperature of the air. On average, it is about 343 meters per second, which is faster than the speed of sound in a vacuum.
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140 m/s
zero
120 m/s
1400 m/s
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flagRepublic of Ireland
0%
100%
0%
0%
10
flagAustralia
0%
87%
7%
5%
40
flagGreece
15%
75%
0%
10%
20
flagAustria
13%
72%
2%
10%
37
flagIndia
14%
68%
6%
9%
165
flagPakistan
12%
68%
12%
6%
16
flagGermany
8%
64%
12%
11%
127
flagthe United Kingdom
6%
63%
14%
12%
47
flagthe Netherlands
16%
58%
25%
0%
12
flagthe United States
12%
50%
22%
12%
63
flagPoland
5%
48%
35%
10%
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