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Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.
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The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?
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Through which type of material does sound tend to travel at the highest speed?
A. Sound trave...
A. Sound trave...
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