How to convert energy in kilojoules (kJ) to electric power in watts (W).
You can calculate watts from kilojoules and seconds, but you can't convert kilojoules to watts, since kilojoule and watt units represent different quantities.
To convert energy in kilojoules to power in watts, you can use the formula:
P(W) = 1000 × E(kJ) / t(s)
where
P is the power in watts, E is the energy in kilojoules, and t is the time period in seconds.To use this formula, simply substitute the values for E and t into the equation and solve for P. In the example you provided, the energy consumption was 9 kilojoules and the time duration was 3 seconds, so the power consumption is calculated as follows:
P(W) = 1000 × 9 kJ / 3 s = 3000 W
Therefore, the power consumption of the electrical circuit in this example is 3000 watts.
It's important to note that this formula assumes a time period of 1 second. If the time period is different, you will need to adjust the formula accordingly by dividing the energy consumption by the time period. For example, if the time period is 2 seconds, the formula would be:
P(W) = 1000 × E(kJ) / t(s) = 1000 × 9 kJ / 2 s = 4500 W
This would give a power consumption of 4500 watts for the same energy consumption of 9 kilojoules, but over a longer time period of 2 seconds.
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