11. A transmission station transmits waves with a frequency of 71 × 104 Hz and a speed of 3 × 108 m per second. The wavelength of waves is
12. Which of the following waves include compression and spillage response-
13. The sound will have the highest velocity in
14. Due to which phenomena sound is heard at longer distance in nights than in day.
15. Which of the following statements are true/false about the speed of sound in different mediums at 25°C?
Statements :
A. Speed of sound in air is 346 m/s.
B. Speed of sound in water (distilled) is 1498 m/s.
Statements :
A. Speed of sound in air is 346 m/s.
B. Speed of sound in water (distilled) is 1498 m/s.
16. In progressive wave,
17. Decibel is a term connected with
18. To detect the obstacles in their path, bats produce . . . . . . . .
19. Waves produced at the bottom of the sea due to an explosion are . . . . . . . .
20. The speed of sound in air at 0°C is
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