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 has shot h:+yc.:g z7n rgpsxdha 75f3wn that:;7v ;.i-*bzdhak8l/ rq6dmu1 whedp x
$$
P=\frac{g h^2}{u^3}
$$
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 x.( eue- yejuxb/ou) k6c (z.jpower, the percentage uncertainty is the power multiplc ze(xjy.o(/u .k)xju-6bue eied by the percentage uncertainty of the measurement. When measurements are multiplied or divided, the percentage uncertainties are added.
| 
Post time 2024-8-21 21:38:19