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The distance that a moving object passes through is called the distance. It can be represented by symbols. In the international system of units, its main unit is the distance
The length of the track through which a moving object passes is called the distance. It can be represented by the symbol S. in the international system of units, its main unit is meter
Zhao Yang has an electric heater in his home. He wants to know the power of the electric heater when it works. He turns off all other electrical appliances in his home,
Only let the electric heater work. After 3 minutes, he observed that the electric energy meter turned 12 turns, and the words "220 V 5A 300r / kW. H" were on the electric energy meter of his home. (1) how many turns does a 100W electric appliance turn in 30 minutes? (2) how long does it take for a 200W electric appliance to turn 60R
(1):100w*30min*60s=180000w,180000w=0.05kw
300r * 0.05 = 15R, so it's 15R
（2）：60r/300r*1kw=3600000w*1/5=720000w
720000w / 200W = 3600s = 6min, so it is 6min
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