题目:
一个中子和一个质子相结合生成一个氘核,若它们的质量分别是m1、m2、m3,则( ) A.由于反应前后质量数不变,所以m1+m2=m3 B.由于反应时释放出了能量,所以m1+m2>m3 C.由于反应在高温高压下进行从而吸收能量,所以m1+m2<m3 D.反应时产生了频率为(m1+m2+m3)c2/h的光子,式中c是光速,h是普朗克常量 |
答案:
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