HomeEveryday Science MCQsSound of frequency below 20 Hz is:___________? 763. Sound of frequency below 20 Hz is:___________?By Admin / September 17, 2025 A. Audiosonic B. Infrasonic C. Ultrasonic D. Supersonic ✅ The correct answer is option B.
1. Which of the following does not pollute the air? Leave a Comment / Everyday Science MCQs / By Admin
2. Which of the following planets have the longest day? Leave a Comment / Everyday Science MCQs / By Admin