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Mimi18121970
@Mimi18121970
April 2019
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Bonjour j'ai cet exercice de maths a faire et je n'y arrive pas
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Thomas1106
Ec =
1)
Ec = (1/2)*150*10² = (1/2)*150*100 = (1/2)*15000 = 7500 J
= 7,5 kJ
(b)
2)
Ec = (1/2)*1000*30² = (1/2)*1000*900 = (1/2)*900000 = 450000 J
= 450 kJ
(c)
3)
Ec = (1/2)*8000*10² = (1/2)*8000*100 = (1/2)*(800000) = 400000 J
= 400 kJ
(a)
2 votes
Thanks 1
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Lista de comentários
1) Ec = (1/2)*150*10² = (1/2)*150*100 = (1/2)*15000 = 7500 J
= 7,5 kJ (b)
2) Ec = (1/2)*1000*30² = (1/2)*1000*900 = (1/2)*900000 = 450000 J
= 450 kJ (c)
3) Ec = (1/2)*8000*10² = (1/2)*8000*100 = (1/2)*(800000) = 400000 J
= 400 kJ (a)