11. At a given temperature, . . . . . . . . has a highest speed of sound.
12. Two astronauts cannot hear each other on the Moon's surface, because
13. Which one of the following does a TV remote control unit use to operate a TV set?
14. Which of the following is a mechanical wave?
15. The distance between node and adjacent anti-node is 30 em. The wavelength is
16. The pitch of sound depends on-
17. . . . . . . . . the frequency is expressed in the event repeated per second.
18. The compression is made at the place where the air pressure is-
19. Which of the following statements are true/false about the speed of sound in a different medium at 25°C?
A. The speed of sound in oxygen gas is 316 m/s.
B. Speed of sound in distilled water is 1498 m/s.
A. The speed of sound in oxygen gas is 316 m/s.
B. Speed of sound in distilled water is 1498 m/s.
20. If the temperature increases, the speed of sound:
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