本题目来源于试卷: Physics Unit32: Elementary Particles，类别为 Generic Physics
[单选题]
A cyclotron of radius 0.25 m acc0e tgs*or vi8ei5) j;*cyy)x lelerates protons in a 8. 9mkeerzb ,b1.7-T magnetic field. What is the ke rzmbe9, kb.8inetic energy of the protons when they leave the cyclotron?
A. $7.8 \; keV$
B. $8.7 \; keV$
C. $7.8 \; MeV$
D. $8.7 \; MeV$
参考答案: D
本题详细解析:
暂无
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Post time 2024-1-22 02:15:01