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 (uic j-dm6 hj3fmp kb qa*/l64 y8t nzwku38a8shown that:
$$
P=\frac{g h^2}{u^3}
$$
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 raised to a power, the percentaa/e(9d u vrm-dge uncertainty is the power multiplied by the perce u( 9mrdad-v/entage uncertainty of the measurement. When measurements are multiplied or divided, the percentage uncertainties are added.
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