Examlex
Evaluate the definite integral by using the method of integration by parts.
Phosphorescence
A type of photoluminescence where a substance absorbs photons and re-emits them, resulting in a glow after the excitation source is removed.
Radioactivity
The spontaneous emission of particles or radiation from the nucleus of an unstable atom as it becomes more stable.
Atomic Nucleus
The dense, positively charged center of an atom, composed of protons and neutrons.
Radioactive Elements
Elements that spontaneously emit radiation as a result of the decay of their atomic nuclei.
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