Question

G CHOOSE THE ODD ONE OUT GIVING REASON

1. Longitudinal wave, sound, light.
2. 30 kHz, Galton Whistles, 20 kHz.
3. High pitch sound, vocal cord, relaxed, taut.
4. Speed of sound, 343 m s-1, air, liquids.
5. Compression, rarefaction, high pressure.
6. Reflection, rigid surface, porous surface.
7. Speaking tube, reflection, absorption. ​

Answer 1

Answer:

1. light

2. galton whistles

3. relaxed

4. liquid

5. rarefaction

6. reflection

7. speaking tube