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Let `vec u=hat i+hat j,vec v=hat i-hat j and vec w=hat i+2 hat j+3hat k`.If `hat n` is a unit vector such that `vec u*hat n=0 and vec v*hat n` then `|vec w*hat n|` is equal to

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MCGROW HILL PUBLICATION-VECTOR ALGEBRA-QUESTIONS FROM PREVIOUS YEARS. AIEEE/JEE MAIN PAPERS
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