Question

B. Fill in the blanks:
1. Sound cannot travel through
2. The speed of sound in iron is
than in air.
3. The speed of sound in water is
than in iron.
4. Sound, pleasant to the ear, is called
and that unpleasant to the ear is
called.
5. The vibrations in objects are responsible to produce
6. Sound energy is converted into
energy by the use of a microphone.
7. Aloud-speaker converts
energy into
energy
8. The minimum distance of a reflector to hear an echo from it, is
min air.
7. The rain, lightning and thunder are
phenomena.​

Answer 1

Answer:

1) the sound can not travel through vacuum

Answer 2

Answer:

the sound cannot travel through vacume .

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