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प्रश्न
State whether the following statements is True or False.
Earthquake waves are infrasonic waves.
सत्य या असत्य
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उत्तर
This statement is true.
Explanation:
- Earthquake waves have a frequency of less than 20 Hz.
- Sound waves of frequency below 20 Hz are called infrasonics, and these waves are used in the study of seismographs.
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अध्याय 3: Sound - Graded Assignment 3.1 [पृष्ठ १८६]
