結果 : how does a compass needle work
1:39

How Do Compasses Work?

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How a COMPASS works!

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How to determine the direction by Compass needle

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How Compass works -Magnetism Lesson for Kids

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The Compass: True North vs Magnetic North

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How To Find Directions Using A Compass Needle? | how to use compass | compass directions

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WHY A COMPASS POINTS TOWARDS NORTH ???? HOW DOES A COMPASS WORK ????

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Make Your Own Compass!

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Effect of current on a compass needle

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