Questins Let horeces Fis-itj. are acting at Olos0), %3D Al20), B(0,-2) and cl3,2). respectively. Find o toxque 4 all porces aboul O. vü Sum torques all porces about O. vitu moment o all the horces about. A, when no purcen is acting acting at A.

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de Broglie Equation

The sketch of matter waves is drawn below: