用加速后动能为EK0的质子11H轰击静止的原子核X,生成两个动能均为EK的42H

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问题:

用加速后动能为EK0的质子

 11
H轰击静止的原子核X,生成两个动能均为EK
 42
He
核,并释放出一个频率为ν的γ光子.写出上述核反应方程并计算核反应中的质量亏损.(光在真空中的传播速度为c)

考点:核能,爱因斯坦质能方程
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函数f(x)=2x-1+
x-1
的值域为______.
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I had a interesting dream last night. I dreamedthat I took part in a race. At first, I could not to run very fast and fell behind. So I didn’t lose heart and keptrunning. All the students on the playground cheer me on, “ Come on!” I was so encouraging that I ran faster and fast till I caught up all the other runners. I felt as if flying like a superman. In the end, I got to the finishing line first.I won the race. I felt very proudly of myself. Many of my classmate threw me up into the air. Just at that timeI woke up and found me still in bed!

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( )建立在多个企业或产业项目的相互关联互动发展基础之上。

A.传统工业
B.生态工业
C.现代工业
D.自然工业

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2005年12月,中央农村工作会议在北京举行。这次会议着重研究的议题是

A.推进社会主义新农村建设

B.加强农村基层 * * 建设

C.进一步减轻农民负担

D.大力发展乡镇企业

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在水体边缘与陆地交界处,为稳定岸壁,保护水体不被冲刷或水淹等因素的破坏而设置的垂直构筑物称为()。

A、驳岸

B、护坡

C、挡土墙

D、花坛砌体

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