P=(Q)/(t) , Q =m xx S(w) xx 30+ m xx L(ice).The power of a system which can convert 10 kg of water at 30^@ C into ice 0^@ C in one minute (L(ice) = 336000 J//Kg and S(water) = 4200 J//kg//K) will be
If the power of a leader in an enterprise is large, the power of the system will be smaller. If the power of the leader becomes smaller, the power of the system will increase correspondingly. The most powerful enterprises in the world must be the power of the system more than the power...
The power of ___is very great.A. pressB. pressureC. the pressD. pressing 相关知识点: 试题来源: 解析 【答案】C 【核心短语/词汇】the press新闻界 【翻译】新闻界的力量很大。 【解析】本题结合句意和选项,这里考查固定搭配,the press,翻译为“新闻界”,“新闻界”press前面一般加the。A.press...
The power of a machine is the rate at which it does work. What is “power” measured in? A. newtons B. joules C. watts D. ohms 相关知识点: 试题来源: 解析 C。“power”功率的单位是瓦特(watts)。选项 A“newtons”是力的单位牛顿;选项 B“joules”是功的单位焦耳;选项 D“ohms”是电...
athe purpose of a power system is to deliver the power the customers require in real time,on demand,within acceptable voltage and frequency limits,and in a reliable and economic manner.in normal operation of a power system ,the total power generation is balanced by the total load and transmiss...
ahe purpose of a power system is to deliver the power the customers require in real time,on demand,within acceptable voltage and frequency limits,and in a reliable and economic manner.in normal operation of a power system ,the total power generation is balanced by the total load and transmissi...
The power of insensitivity can be explained as “slow power”. Usually, people connect “insensitivity” with something bad, but indeed, it stresses the ability to keep doing something difficult without complaining.2It is not a weakness but an approach to winning a better life. ...
由第二段的:People express traditional culture or their own feelings with different styles of paper-cuts. (人们用不同样式的剪纸表达传统文化或他们自己的感情)可知本题错。【小题3】T It is not easy to make a perfect paper-cut. 句意:制作一份完美的剪纸不容易。由第三段的第一句:It is easy to...
电力 E.v.推动,驱动 F.n.统治;政权(1)It was in the year 1843 that he came to power with his wife's assistance.(2)The electric car, powered by the latest battery.can drive 600 miles on a single charge.(3)The patient is left with the power to choose what he wants to ta...
1、,Lesson52 The Power of a Smile,岷县小寨九年制学校 宋霞,Learning objectives:,1.To be able to understand the passage. 2.To practice the reading skills. 3. To learn about how to give suggestions about adapting to a new environment. 4. To realize the importance of smiling and learn to...