April 2019 1 57 Report

bjr aidez moi svp svp

exo n1 infiniment petit

1 la plus petite bacterie a un diametre de 0.1 micrometre 1 micrometre corespond a 1 millieme de mm

2 le virus le plus long messure 0.02mm

3 le virus le plus petit a 17 nm de diametre : un nanometre ( 1 nm ) correspond a 1 milliardieme de metre

donner l'ecriture scientifique en millimetre de chacun de ces nombres .

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