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How much energy does a pair of 800 W hair straighteners transfer every second?

As I understand, a pair of hair straighteners is one thing, not two. It is marked as 800 W, which indicates their power consumption. W means Watt, a unity of power named after James Watt, a Scottish inventor who made great improvements to a steam engine.


By definition, power is the work over time, or the speed of performing work. Also, it may be defined as the speed of using energy. The unit for energy...

As I understand, a pair of hair straighteners is one thing, not two. It is marked as 800 W, which indicates their power consumption. W means Watt, a unity of power named after James Watt, a Scottish inventor who made great improvements to a steam engine.


By definition, power is the work over time, or the speed of performing work. Also, it may be defined as the speed of using energy. The unit for energy is Joule, named after an English physicist James Joule. Thus a power of 800 W means 800 Joules used during one second.


Because a conversion of electric energy into heat energy is performed almost without a loss of energy, we may state that a pair of hair straighteners transfers 800 Joules of energy every second.

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