Tag: surface

The Reflection of Sound

People hear various kinds of sounds everyday, such as music, creatures’ voices and even ourselves’ breathing. Lots of people would like to enjoy music by their earphones instead of by their phones, for the echo of earphones is…

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Brainteasers for Physicists, Biologists, Chemists, Mathematicians and Other Crazy Brainiacs

You can imagine speeds of light, sound and falling objects without being a physicist, and you can envision the Earth’s vast biodensity of insects, birds and fish without being a biologist. You can grasp the infinitesimally small size…

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