长的英语

有一额定功率220V,40W的日光灯（功率因数为0.5）镇流器功耗为8w ,接于220V,50Hz的电源上有一额定功率220V,40W的日光灯（功率因数为0.5）镇流器功耗为8w,接于220V,50Hz的电源上,为了提高功率因素,在 若已知日光灯电路的功率因数为0.45,电源电压为220V,灯管电压为98V,估算镇流器两端电压为多少? happiness is for everyone阅读答案Happiness is for everyone.You don’t need to care about those people who have beautiful houses with large gardens and swimming pools or those who have nice cars and a lot of money and so on.Why?Because those who happiness is for everyone.You don't need to care about the rich .Though theyHappiness is for everyone. You don't need to care about the rich. Though they have beautiful houses with large gardens and swimming pools, they may often feel lonely. In fact Happiness is/ attracts everyone.需要加is吗? What is happiness?That is to cover up his sadness for everyone smile.翻译成中文..能给我个正确无误统一德答案么个位 happiness is f_everyone.f是这个单词的首字母 电子烟有什么真正的危害? 烟有什么伤害 电子烟有什么危害吗?会比普通香烟还不好吗? 工厂排放的烟有什么害处 1吨聚乙烯醇能做多少胶水 RC串联正弦稳态电路中,电阻R=120欧,容抗Xc=160欧,则阻抗∣Z∣等于 写山的诗句有哪些? 在40W荧光灯电路中已知电源为220V,50Hz,灯管端电压为100V,功率消耗为40W,镇流器功率消耗为8W,灯管电流为0.4A,求电路的总有功功率,视在功率,无功功率和功率因数.初学者对一些专业名词还不太了 建筑的构成要素有哪些 交流电路中电阻6Ω,感抗12Ω,容抗4Ω,问电路的阻抗是多少?（具体步骤） 已知阻抗Z=25欧,电阻R=15欧,求感抗XL=?我已经知道感抗的答案为20欧,但是我想知道这是怎么算出来的,要有计算过程和公式,题目本来是这样的,某磁铁线圈的阻抗Z=25欧,线圈的电阻R=15欧,求感抗XL=? 聚乙烯醇和丙烯酰胺能做胶水吗 浓硫酸吸水性问题浓度最低为多少有吸水性?80%的有吸水性吗 Everyone___that smoking is not good for health ,but .的完形填空的答案 Smoking is good for your health.Smoking is ( )( )your health. Smoking is bad ()health but reading is good()us.介词填空,用初一下学期第五单元知识点.急紧急! 烟盒上一句英语有错吗?smoking is harmful to your health.Quit smoking early is good for your health. 一线圈电阻3欧,感抗12欧,与容抗为8欧的电容串联,则电路中的阻抗为多少? smoking is not good for your health同义句 一个金鱼缸的底面棱长都是8厘米,装有6厘米深的水,放入一块珊瑚石后水面上升到7cm,珊瑚石体积是多少 220v的日光灯一点反应都没,灯管和启辉器都好的拆下灯管后,测量电感镇流器输出端与零线之间的电压为185v,这镇流器好吗 有一个棱长4分米的正方体金鱼缸里面装了一些水,测得底部至水面的高度为2.放入一个人造珊瑚石后,这时水面上升至3分米,求珊瑚石的体积 电感镇流器日光灯的启辉器!不能启动灯管怎么回事?我用摇表能把灯管摇亮!整流器是好的 荧光灯不亮了,只有电子镇流器,没有启辉器,我用外用表测有220V电进入镇流器,我该怎么判断是镇流器不好还是灯管不行?我本来想测量镇流器出线有没有电压的,可是有4根线我都不知道测那两 日光灯的启辉器的工作原理是怎么样的?如果不用镇流器直接将220V接上灯管会有什么反应没?