Physics
Read the clues across and clues downwards and fill up the blank squares.
Across :
- Sound travels in air in the form of …………… waves.
- Hertz is a unit of …………… .
- The sound heard after the reflection.
- Higher the ……………, shriller the sound.
Down :
- Bat can produce …………… waves.
- Sound is produced when a body creates …………… .
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