📅 NSB 2011🎓 HS🔄 Round 3#️⃣ Q8❓ Toss-Up✍️ Short Answer
A train moving at 35 meters per second emits a whistle with a frequency of 900 hertz. Assuming that the speed of sound in air is 350 meters per second, what is the frequency, in hertz, measured by a stationary observer in front of the train?
✔️Answer:1000
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