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4. a)The speed of an electron is measured to within an uncertainty of 2.0x104 m/s. What...

4. a)The speed of an electron is measured to within an uncertainty of 2.0x104 m/s. What is
the size of the smallest region of space in which the electron could be confined?
b)The Σ∗particle has a rest energy of 1385 MeV and a lifetime of 2.0x10-23 s. What would
be a typical range of outcomes of measurements of the Σ∗ rest energy?

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