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A Thunderous Sound

tipo de documento Ciències de la Terra i Medi ambient - Experiment/Pràctica

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The big flash you see when lightning strikes is a natural electrical discharge between a cloud and the ground, or within a cloud. This lightning can travel as fast as 140,000 MPH and reach temperatures of 30,000°C. It heats the air adjacent to approximately 20,000°C - which is hotter than the surface of the sun. The temperature of the air drops quickly, causing a rapid contraction of the air. This rapid expansion and contraction of air creates intense supersonic shock wave. As this shock wave slows down to the speed of sound, you hear the thunderclap.What causes thunder and why is a thunderclap so loud?

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