Kognity IB Physics A.0 Measurements & Uncertainty (id: 3fa7c8121)

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本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IBDP Physics

[单选题]
Experimental data hasq2r1j h 2kx/)izt yhu* shown tha-2 cg,. qubuwxt:
$$
P=\frac{g h^2}{u^3}
$$
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 v *l8d k:04is prrzt6+fny1 l5ohf( yzraised to a power, the percentage uncertainty is the power multiplied by the percentage uncertainty of the measurement. When measurements are multi 1t4z6 (o fkdr5y8:z ihvl0flys+*p rnplied or divided, the percentage uncertainties are added.