本题目来源于试卷: Physics Unit7: Linear Momentum，类别为 通用国际物理
[单选题]
A proton, of mass m, at re kem;4l3 nyts tb*-3fyst, is struck head-on by an alpha-pa.km;ikw m.vg +hs, b2sfo(p q;rticle (which consists of 2 protons and 2 neutronbmo.v;s f.p +q2;skm(khwg,is) moving at speed v. If the collision is completely elastic, what speed will the alpha-particle have after the collision? (Assume the neutron's mass equals the proton's mass.)
A. zero
B. 2v/3
C. 3v/5
D. 5v/3
参考答案: C
本题详细解析:
暂无
| 
