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So-called volcanic ash is actually finely pulverized rock blown high into the atmosphere. A typical ash particle is a 50-m -diameter piece of silica with
So-called volcanic "ash" is actually finely pulverized rock blown high into the atmosphere. A typical ash particle is a 50-m -diameter piece of silica with a density of 2400 kg/m3 . How long in hours does it take this ash particle to fall from a height of 5.0 km in still air? Use the properties of 20 C air at sea level
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