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Why is mathematics such an effective language for physics? Opinion 1 Opinion 2 Opinion 3 Opinion 4
Why do we live in a world with 3 spatial dimensions? 2 Min Video 8 Min Video Wikipedia Summary
Why does Newton's gravitational constant G have the value it does?
Why is a particle's inertial mass the same as its gravitational mass?
Why have we not seen any magnetic monopoles?
Did the Universe start with a state of very low entropy?
Why does the speed of electromagnetic waves in vacuum not depend on the frame of reference?
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