31. Compression and rarefaction are due to variability of:
32. Soundcan transmit from . . . . . . . .
33. For a wave, wavelength divided by the time period is equal to
34. Which of the following statements are true/false about the speed of sound in different mediums at 25°C?
A. In water (sea), the speed of sound is 1531 m/s.
B. In air, the speed of sound is 346 km/s.
A. In water (sea), the speed of sound is 1531 m/s.
B. In air, the speed of sound is 346 km/s.
35. Which of the following is used to detect cracks and flaws in metal blocks?
36. What is a single frequency sound called?
37. If any explosion takes place at the bottom of a lake, what type of shock wave in water will take place?
38. Find the speed of sound in air.
39. A particle is moving in a circle with uniform speed. Its motion is
40. Which of the following represents the distance travelled by a wave in one second?
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