Because in difrent materials atoms are more compact or less compact.if they are less compact then it will be easear for them to move
A tornado! I think or it could be rain
From google but i can explain further if needed. <span> The </span>balanced<span> equation for the reaction of interest contains the stoichiometric ratios of the reactants and products; these ratios </span>can<span> be used as </span>conversion factors<span> for mole-to-mole </span>conversions<span>.</span>
The rate of change in velocity<span> is called acceleration.</span>
