How many fundamental forces are there in our universe? For particle physicists, answering this question can be tricky.
Of course, there’s the force of gravity, which keeps us from floating out of our seats. There’s also the strong nuclear force, which glues the nuclei of our atoms together. Then there’s the electromagnetic force, which is where we get electric currents and magnetic fields. And there’s the weak nuclear force, which mediates radioactive decay.
We’re up to four forces, right?
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