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At what speed (m/s) must a 3.0 mg object be moving in order to have a de Broglie wavelengthof 5.4 × 10-29 m?

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At what speed (m/s) must a 3.0 mg object be moving in order to have a de Broglie wavelengthof 5.4 × 10<sup>-2</sup>9 m?


 
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