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the movement of particles from an area of higher concentration to an area of lower concentration. The particles move down the concentration gradient.
polyvinyl acetate, a colourless thermoplastic material used in inks and adhesives.
the time required for half the atoms present in an object have undergone radioactive decay and...
the substance that liberates electrons (undergoes oxidation) and causes the other substance to...
the quantity of charge available from the fully charged cell.