本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IB物理学
[单选题]
Experimental data has shoizwji- tw uxhk4.wd 8*4i m)-dwn thatq cyztx c8 tf)c49(fu**of/ kw:
$$
P=\frac{g h^2}{u^3}
$$
where $g$ is a constant. If the percentage uncertainties in $h$ and $u$ are $a$ and $b$ respectively, what is the percentage uncertainty in $P ?$
A. $2a + 3b$
B. $2a - 3b$
C. $(2a/3b)$
D. $a^2/b^3$
参考答案: A
本题详细解析:
When measurements are rt w),ajnmvm7bv-9; p taised to a power, the percentage uncertainty is the power multiplied by the percentage uncertainty of the measurement. When measurements are multiplied or divided, the percentage unce n-tta)v,b79mpv; wjmrtainties are added.
| 
