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Margauxb86
@Margauxb86
April 2019
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Aidez moi a le faire les matheux s'il vous plait c'est pour demain noté sur 20 je voudrais les calcul exact et tout sa. Merci beaucoup !!
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eivmam
Volume de la glace:
V=(1/3)*pi*h*r^2=(1/3)*pi*13,8*2,5^2=88,4 cm cube=88,4mL.
Pour 100mL de glace, on a 830kJ donc pour 88,4mL on a: 88,4*830/100=733kJ
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Voila un exo que j'arrive pas ! HELP HELP HELP ME !
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V=(1/3)*pi*h*r^2=(1/3)*pi*13,8*2,5^2=88,4 cm cube=88,4mL.
Pour 100mL de glace, on a 830kJ donc pour 88,4mL on a: 88,4*830/100=733kJ