4 years ago

An electric kettle is rated at 2kW. How much energy is transferred in 30s?

2 answers:

5 0

$answer \\ = 30000 \: joule \\ solution \\ p = \frac{energy}{time} \\ power = 2kw = 2000 \: w = 2000j/s \\ (since \: 1 \: kw = 1000 \: j / s) \\ energy \: transformed \\ = power \times time \\ = 1000 \:j /s \times 30 \: s \\ = 30000 \: joule \\ hope \: it \: helps$

yulyashka [42]4 years ago

5 0

Answer:

60,000 Joules

Explanation:

GIVEN:

Power = 2kW = 2000 W

Time = 30 sec

REQUIRED:

Energy = ?

SOLUTION:

Power = Energy / Time

Making Energy the subject of formula

Energy = Power × Time

E = 2000 W × 30 s

E = 60,000 Joules

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