The total mechanical energy of an object is calculated as
the product of kinetic energy and potential energy of the object
da fraction of kinetic energy over potential energy of the object
the difference of kinetic energy and potential energy of the object
the sum of kinetic energy and potential energy of the object

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Decomposition is the cycle at which bacteria breaks down any organic material into the soil

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).