本题目来源于试卷: Physics Bowl by Topic 1: Unit, Prefix, Significant Figures, Estimation & History，类别为 美国物理杯赛(Physics Bowl)
[单选题]
12.46: There is a quan3;.lo)lbnu5 blj k;sctity /4 ngdz3vm0: lz 9 8spgeo*khdcalled the Planck time $t_{planck}$ which is computed in terms of constants as $t^2_{Planck} = \frac{\hbar G}{c^n}$ where $\hbar$ is Planck's constant divided by $2\pi$, $G$ is the Universal Gravitational Constant, and $c$ is the speed of light. In order for this expression for time to be consistent, what is the numerical value of $n$, the power to which the speed of light is raised?
A. 2
B. 3
C. 4
D. 5
E. 6
参考答案: D
本题详细解析:
暂无
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