作业帮100分求一道物理题 If the mass of a hydrogen atom is 1.67*10^-27kg and the mass of an electron is 9.1*10^-31kg,how many electrons would be required to have a mass equivalent to one hydrogen atom?
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100分求一道物理题 If the mass of a hydrogen atom is 1.67*10^-27kg and the mass of an electron is 9.1*10^-31kg,how many electrons would be required to have a mass equivalent to one hydrogen atom?
100分求一道物理题
If the mass of a hydrogen atom is 1.67*10^-27kg and the mass of an electron is 9.1*10^-31kg,how many electrons would be required to have a mass equivalent to one hydrogen atom?
100分求一道物理题 If the mass of a hydrogen atom is 1.67*10^-27kg and the mass of an electron is 9.1*10^-31kg,how many electrons would be required to have a mass equivalent to one hydrogen atom?
这道题的意思是一个氢原子的质量是1.67*10^-27kg ,一个电子的质量是 9.1*10^-31kg,问多少个电子的质量和一个氢原子的质量相等,所以答案是 1.67*10^-27/9.1*10^-31=1835个
要制备一个肖特基结（金属半导体整流接触），有如下两种金属，功函数分别为：Al：Wm＝4.20eV，Pt：Wm＝5.4eV。选择合适的金属，给出选择的理由。并计算
hydrogen atom是原子核，质量为1.67*10^-27kg，
electron是电子，质量为9.1*10^-31kg，
问题是多少个电子和一个原子核质量相同，所以答案为1.67*10^-27kg/（9.1*10^-31kg）=1835个