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The energy-position uncertainty and the momentum-time uncertainty expressions for a nonrelativistic particle are derived from the two mathematical expressions of the Heisenberg uncertainty principle. These additional expressions are:
ΔEΔx < ћc (the energy-position uncertainty)
ΔpΔt > ћ/c (the position-time uncertainty)
where c (= 2.99792×108 m s-1) is the speed of light.
The energy-position and the momentum-time uncertainty expressions