physics

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Across
  1. 1. A unit of speed based on the ratio of an object’s speed to the speed of sound in the surrounding medium (e.g., Mach 1 is the speed of sound).
  2. 5. Frequency The frequency at which a system naturally oscillates when not subjected to an external force or damping.
  3. 9. A periodic variation in sound intensity that occurs when two sounds of slightly different frequencies interfere with each other.
  4. 10. Interference When waves combine to reduce amplitude because their displacements are in opposite directions.
  5. 12. Interference The phenomenon that occurs when two or more waves overlap, resulting in a combined wave.
  6. 13. Superposition The principle that the displacement caused by two or more waves is the sum of their individual displacements.
  7. 14. Sound waves with frequencies higher than the human hearing range, typically above 20,000 Hz.
  8. 16. Whole-number multiples of a fundamental frequency, which together create complex sounds or tones.
  9. 17. Interference When waves combine to increase amplitude because their displacements are in the same direction.
  10. 19. The phenomenon where an object vibrates with maximum amplitude at its natural frequency when subjected to a matching external frequency.
  11. 21. A logarithmic unit used to measure the intensity or loudness of sound.
Down
  1. 2. Refers to speeds that are five times the speed of sound (Mach 5 or higher).
  2. 3. The part of a longitudinal wave, such as a sound wave, where particles of the medium are closest together, resulting in high pressure.
  3. 4. Vibration A vibration that occurs when an external force or periodic energy is applied to a system, causing it to vibrate.
  4. 6. The part of a longitudinal wave where particles of the medium are spread apart, resulting in low pressure.
  5. 7. Effect: The change in frequency or wavelength of a wave as observed by someone moving relative to the source of the wave (e.g., the pitch of a siren changes as it passes).
  6. 8. Wave A wave that appears to be stationary, formed by the interference of two waves traveling in opposite directions with the same frequency.
  7. 11. Sound waves with frequencies below the human hearing range, typically below 20 Hz.
  8. 15. A point in a standing wave where the displacement is at its maximum.
  9. 18. The perception of how high or low a sound is, determined by the frequency of the sound wave.
  10. 20. A point in a standing wave where there is no displacement of the medium (no movement).