A 100 W bulb B1, and two 60 W bulb B2 and B3, are connected to a 250 V source, as shown in figure. Now W1,W2andW3 are the output powers of the bulbs B1,B2andB3, respectively. Then View Solution Three bulbs of 40W,60Wand100W are connected in series with a 240V source. View...
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根部病害有:立枯病Rhizoctonia solani、猝倒病Pythium debaryanum、枯萎病Fusarium bulbigenum (F.oxysporum)。紫斑病紫斑病 还有孢囊线虫Heterodera glycines主要发生在黑龙江、吉林、辽宁、内蒙古、河北、山东、河南等省(自治区)。根疫病Phytophthora magasperma var.sojae是美国的主要病害,中国尚未发现。是检疫对象。
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Watt hours (Wh), sometimes written W.h, can measure either electrical energy produced, say by a power station, or Watts can measure the amount of electrical energy consumed (say at a light bulb or an air conditioner in our home). For air conditioners, the A/C units' total Wh is the...
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Consider this: a resting human being requires about the same amount of energy as an old-fashioned incandescent light bulb to sustain their metabolism – about 90 watts (joules per second). But the average human being in a developed country uses more like 100 times that amount, if you add ...
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