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law of conservation of matter

n.
1.a fundamental principle of classical physics that matter cannot be created or destroyed in an isolated system

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Word of the Day

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  • law of conservation of mass
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  • law of conservation of energy
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  • law of common fate
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  • law of closure
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  • law of chemical equilibrium
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  • law of averages
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  • law of areas
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  • law of archimedes
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  • law of action and reaction
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  • law merchant
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  • law of constant proportion
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  • law of continuation
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  • law of definite proportions
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  • law of diminishing returns
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  • law of effect
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  • law of equal areas
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  • law of equivalent proportions
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  • law of gravitation
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  • law of independent assortment
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  • law of large numbers
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  • fibrillation
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  • tocainide
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  • cable
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  • farm
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  • health club
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    Idiom of the Day

    second hand
    not new, used by someone else
    We went to a second-hand bookstore to look for the books.



    1.
    Choose an idiom to replace the expression in the brackets:
    The man has been (exhausted) all week from looking after the children.

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