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Verified answer
1. P = V. I= 220 V . 0,4 A
= 88 W
2. W = I². R. t
= (0,5 A)². 1000 Ω. 7200 s
= 0,25 A². 1000 Ω. 7200 s
= 1800.000 W
= 1,8 MW
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