On the calculation of electric power The dial of Xiaoming's electric energy meter is marked with "220v10a" and "3000r / (kW · h)". In order to check the power of an electric rice cooker at home, he stopped using all the electrical appliances at home, connected only one electric rice cooker in the circuit, and then observed that the turntable of the electric energy meter at home had turned 30 circles in 1min, so how big is the power of Xiaoming's electric rice cooker? | Math enthusiast | Mathematical art

On the calculation of electric power The dial of Xiaoming's electric energy meter is marked with "220v10a" and "3000r / (kW · h)". In order to check the power of an electric rice cooker at home, he stopped using all the electrical appliances at home, connected only one electric rice cooker in the circuit, and then observed that the turntable of the electric energy meter at home had turned 30 circles in 1min, so how big is the power of Xiaoming's electric rice cooker?

It's obvious that the energy meter can run at 3000 rpm
30 revolutions per minute, 30 times 60 per hour equals 1800 revolutions,
According to the formula of one kilowatt hour,
W=30r/(3000r/（kw·h）)=1/100kw·h=36000J
The power of electric rice cooker is:
P=W/t=36000J/60s=600W
600W

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