Three students were asked to weigh 3.5 g of NaCl. The recorded readings were 3.4 g, 3.6 g, and 3.3 g. How can these readings best be interpreted?
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A density matrix is a matrix that describes the statistical state, whether pure or mixed, of a system in quantum mechanics. The probability for any outcome of any well-defined measurement upon a system can be calculated from the density matrix for that system. ... Density matrices that are not pure states are mixed states
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Collect at least six objects of different materials. Check them for their friction
by sliding an object on their surfaces. Now arrange them according to their friction
(high to low). How their friction can be reduced? Suggest some methods according
to the
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