5. a kettle has a power of 1200 w (hint: 1200 w = 1200 j/s). if the kettle
takes 2.5 minutes to boil water, how much energy had been transferred?

180,000 Joules

Explanation:

Hint: 1200 W = 1200 J/S

The kettle takes 2.5 minutes to boil water.

1 minute = 60 seconds

2.5 minutes = ?

Cross multiplying gives; 150 seconds

The energy transferred to boil the water in 150 seconds = 1200 J/S × 150 S = 180,000 J

the answer

Explanation:

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