PHYSICAL SCIENCE
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Science Bowl Question

📅 NSB Round Robin 2008🎓 MS🔄 Round 5#️⃣ Question 11❓ TOSS-UP📝 Multiple Choice

Ultrasonic sound frequencies are typically considered to be

W) above 20,000 kilohertz
X) below 20,000 kilohertz
Y) above 20,000 Hertz
Z) below 20,000 Hertz
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