9. Pregnant women usually undergo ultrasound to check the baby's development. Which of the following properties of sound is being utilized by this technology?
A. reflection C. interference
B. refraction D. dispersion
10. Concerts are usually held at nighttime because sound is heard better in far areas during nighttime than during daytime. Which of the following properties of sound is being observed in this situation?
A. reflection C. interference
B. refraction D. dispersion
50 sa gc4sh pasagot pls
A. reflection C. interference
B. refraction D. dispersion
10. Concerts are usually held at nighttime because sound is heard better in far areas during nighttime than during daytime. Which of the following properties of sound is being observed in this situation?
A. reflection C. interference
B. refraction D. dispersion
50 sa gc4sh pasagot pls
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c. at d
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Answer:
9.B
10.C
Explanation:
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