science
Grade-4-
Easy
Question
In vacuum, mechanical waves cannot propagate because there _________.
- Is no matter
- Is no energy
- Is no disturbance
- Are no vibrations
Hint:
Mechanical waves travels through medium.
The correct answer is: Is no matter
- In vacuum, mechanical waves cannot propagate because there is no matter.
- Mechanical waves needs material particles to propagate.
- So, the correct option is a.
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