Question # 1

Dolphins can hear sound underwater from up to ............ away

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15 km

20 km

25 km

30 km

What is transferred by teh movement of waves.

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matter

energy

both a and b

None of these

What type of wave does not need matter to travel through.

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Mechaical

Electromagnetic

Sound

Transverse

Speed of sound in water is

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1000 ms-1

1500 ms-1

900 ms-1

2000 ms-1

------------ waves are produced in stretched string.

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Longitudinal wave

Elecromagnetic wave

Transverse wave

None of these

Which have audible range for 2 kHz and 110 kHz.

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Human

Owl

Bat

Dolphin

The wavelength of red colour is.

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700 nm

800 nm

900 nm

600 nm

The lowest pointof a wave is................

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Crest

Amplitude

Peak

Trough

Sound cannot pass through.

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Solid

Liquid

Vacuum

Gasses

Which of the following animals can respond to lowest frequency.

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Cat

Cow

Dog

Dolphin

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