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Question

# Apply The average speed of the coronal solar wind is $450 \mathrm{~km} / \mathrm{s}$. How long does it take a particle in such a wind to reach Earth? (Assume that the distance from Earth to the sun is $150,000,000 \mathrm{~km}$.)

Solution

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Solar wind particles move at high speed from the solar corona to the Earth. We are given the speed of the solar wind and the distance between the Earth and the sun. The goal is to calculate how long it will take for the charged particles to reach the Earth's surface.

Data:

$\textrm{speed (solar wind)=}450\: \textrm{km/s}$ $\textrm{s (Earth to Sun)=150\,000\,000\,000 km}$

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