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Josh shouts down the school hallway and his friend standing at the end. His voice is heard in 0.057s. How long is the hallway?

Sagot :

keijosalonen

Answer: Hallway is 20 m long

Explanation: assume speed of sound is 343 m/s in 20 C temperature.

Distance s= vt = 343 m/s· 0.057 s= 19,55 m

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