Gon a standard 8×8 chessboard (alternating black and white squares), label the rows and columns . you pick a square at random. are these events independent. (a) a = {white square}; b = {black square}. (b) a = {even row}; b = {even column}. (c) a = {white square}; b = {even column}.

energy can cross the boundaries of a closed system in the form of heat and mass

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science is the study of the nature and behavior of natural things and the knowledge that we obtain about them. a science is a particular branch of science such as physics, chemistry, or biology. physics is the best example of a science which has developed strong, abstract theories.

pseudoscience is a collection of beliefs or practices mistakenly regarded as being based on scientific method.

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assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.

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