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10 problems involving speed of sound calculations. P1: 'Speed of sound at 30°C = ___ m/s' (349). P2: 'Echo heard after 4s from a building. Distance = ___ m' (680). P3: 'Lightning to thunder = 6s. Distance = ___ m' (2040). P4: 'Sonar pulse returns in 0.3s in water (v=1500). Depth = ___ m' (225). P5:
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