Sound cannot travel through ______?
General Science / General Science Class 4 MCQs — Multiple-choice practice
آواز ______ سے گزر نہیں سکتی؟
- A. Vacuum
- B. Gases
- C. Liquid
- D. Solid
Correct answer
Vacuum
Explanation
Explanation Because sound is just vibrating air, space has no air to vibrate and therefore no sound in a vacuum . Sound waves below 20 Hz are known as infrasound . Sound waves above 20 kHz are known as ultrasound Sound waves transmit a medium such as a gas, liquid, or solid. The speed of sound in air is about 343 meters per second The sound travels at 1,481 m/s in water The speed of sound in a vacuum is zero meters per second.
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