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What is the uncertainty in locating the...

What is the uncertainty in locating the position of an electron with speed `25ms^(-1)` having uncertainity of`0.1 %` ?

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Unceratainty in the speed `= 0.1 % `
` Delta v= ( 0.1 ) /( 100 ) xx25`
` Delta V= 2.5 xx10 ^(-2) ms^(-1)`
according to heisenberg .s uncertainty principle
` Delta xx xx Delta P ge (h)/( 4 pi)`
` Delta x ge (h )/( 4 pi m Delta V ) `
` Delta x = ( 6.626 xx10 ^(-34)kg m^(2) s^(-1)) /( 4xx3.142xx(9.1 xx 10 ^(-31) Kg ) xx ( 2.5 xx 10 ^(-2) ms^(-1)))`
` Delta x = 2.317 xx 10 ^(-3)`m
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