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A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.

A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.

A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.

A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.

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A compass has a magnet that points north, according to the Earth's magnetic field. It is useful, precisely, to find out where north is.

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15y ago
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Q: How a compass works and why it is useful?
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