Top network posts

• 109 Can we theoretically balance a perfectly symmetrical pencil on its one-atom tip?
• 74 Why can't I do this to get infinite energy?
• 58 How can a red light photon be different from a blue light photon?
• 47 Will a propeller work in a superfluid?
• 30 Why is the force exerted by a light beam on a spherical object independent of the amount of light reflected or absorbed?
• 24 How do burrowing animals get enough oxygen?
• 24 Have we directly observed the electric component to EM waves?
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