問題詳情

30. A neutron has a mass of 1.67 ✖ 10-27 kg. Its de Broglie wavelength is 1.4 ✖10-10 m. What is its kinetic energy (h=6.626 ✖10-34m2kg/s) ?
(A) 40 eV
(B) 4 eV
(C) 0.4 eV
(D) 0.04 eV
(E) 0.004 eV

參考答案

答案：C

統計：A:0,B:0,C:1,D:0,E:0

難度：計算中