What does an air bubble in a blob of water do if you take away the gravity?
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Physics, cosmology, astrophysics, electricity, energy, forces, gravity, light and maths...
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Why is it that headphone wires, even when put away neatly, always end up in a tangle - worse even than you could do on...
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Where do Magnets get the power to stick or repel?
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Could an astronaut skydive from space? Would a spacesuit handle the re-entry heat?
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If the speed of light is slower in glass than in air, where does the energy come from to speed it up as it exits the...