The mechanical energy of an object is equivalent to the sum of its potential and kinetic energy. If the helicopter is grounded, then its mechanical energy will be 20 J. If it is in the air, then its potential energy will be calculated using:P.E = mghAnd then added to the kinetic energy to obtain mechanical energy.
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I believe it is presidential Democracy due to the fact the citizens elect the ruler/president.
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Answer: Relate to their managers and deal with organizations from the outside
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