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What is the de-Broglie wavelength associ...

What is the de-Broglie wavelength associated with (a) Electron moving with velocity of `4.5xx10^(6) m//s` and (b)30 g ball moving with speed of 15.0 m/s

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(a)`lambda`=0.162 nm, (b)`lambda.=1.4733xx10^(-33)m`
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