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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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32. Multiple choice question XXXII

1. The bats can fly in the darkness of night without colliding with the other objects by emitting special sounds while flying. Which characteristic of sound is used by the bats to navigate?

Ultrasound
Infrasound
Audible sound
None of these

2. Which of the following can produce longitudinal as well as transverse waves under different conditions?

Bats
Slinky
Tuning fork
None of these

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