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Sagot :

Réponse:

1) 2 kWh

2) 7200 J

3) 8000 Wh

4) 4000 W

Explications:

1) 1500W = 1,5kW --> 1,5/3=0,5 --> 0,5*4=2

2) 2*3600

3) 7471-7463=8kWh=8000Wh

4) P=E/t --> 8000/2

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