本题目来源于试卷: Space Time & Motion A.2 Forces & Momentum，类别为 IB物理学
[单选题]
A stationary nucleus of uranium-238 undergoes alpha decay to form thorium-234. The initial speed of the alpha particle is v. What is correct about the magnitude of the thorium-234 velocity and its direction?What is Magnitude and what is Direction
A. $\frac{4}{234}v$ Same as the alpha particle
B. $\frac{234}{238}v$ Opposite to the alpha particle
C. $\frac{234}{238}v$ Same as the alpha particle
D. $\frac{4}{234}v$ Opposite to the alpha particle
参考答案: D
本题详细解析:
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