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Physics is the science of the very small and the very large. Learn about Isaac Newton, who gave us the laws of motion and optics, and Albert Einstein, who explained the relativity of all things, as well as catch up on all the latest news about Physics, on

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Question: A positively charged rod is brought close to a neutral metallic sphere. The demonstrator touches the other side of the sphere briefly, then removes the rod. What is the net charge on the sphere?

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Growth is one of the stupidest purposes ever invented by any culture. We've got to have an enough. We have got to ask growth for what, and why, for whom, and who pays the cost, and how long can it last, and what's the cost to the planet, and how much is enough?

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