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<p>other quantities, in contrast to classical systems where these quantities can be measured continuously. Measurements of quantum systems show characteristics of both <a href="page.php?w=particle">particle</a>s and <a href="page.php?w=wave">wave</a>s (<a href="page.php?w=wave-particle_duality">wave-particle duality</a>), and there are limits to how accurately the value of a physical quantity can be predicted prior to its measurement, given a complete set of initial conditions (the <a href="page.php?w=uncertainty_principle">uncertainty principle</a>).</p><p>
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