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        本题目来源于试卷:  Physics Unit8: Rotational Motion ,类别为 通用国际物理 
[单选题]A proton of mass $1.67 \times 10^{-27} \; kg$ rotates with an angular speed of 2 x 106 rad/s in a circle of radius 0.80 m in a cyclotron. What is the orbital angular momentum of the proton?
 
 
 
A. $1.28 \times 10^{-21} \; kg \cdot m^{2}/s$ B. $1.76 \times 10^{-21} \; kg \cdot m^{2}/s$
 C. $2.14 \times 10^{-21} \; kg \cdot m^{2}/s$
 D. $3.20 \times 10^{-21} \; kg \cdot m^{2}/s$
 
 
 参考答案:  C
 
 
 本题详细解析:
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