定义:,即为一兆焦耳(1*10^6焦耳),大致相当于一辆一吨重的车以160km/h的速度行驶所具有的动能。 1兆焦(MJ)=1000千焦(KJ)=1000000焦(J),其中1焦(J)被定义为1N的力使对应物体发生1m的位移所做的机械功,即 1J=1N·1m。
此3兆焦装置是第一个拥有存储定向能武器所需高热能力的大型模型。
The 3 megajoule device is the first large scale module capable of storing heat at a high rate as required for DEW.
我是在整个价电子的集合上作平均,最后得到1。91兆焦每摩尔。
I'm averaging it over the entire set of valence electrons which gives me 1.91 MJ per mole.
布置学生调查家里去年的用电量(千瓦时)和石油气消耗量(兆焦)。
Ask students to research their home electricity consumption (in kWh) and gas consumption (in MJ) of last year.
I'm averaging it over the entire set of valence electrons which gives me 1.91 MJ per mole.
我是在整个价电子的集合上作平均,最后得到1。91兆焦每摩尔。
And, one other thing that I failed to point out, if you take a look at the energies associated with the outermost electrons, in this case, lithium, you see it's 0.5 megajoules per mole, and then what's the 6.26?
还有另外一点我忘记提到的是,如果你观察离最外层,的电子的能量,在这种情况,对于锂,你可以得到,它是每摩尔0。5兆焦,那么6。26是什么呢?
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