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 shown thvxegfy ioxu4o 676 9q:at:96 qcdhw4hf 9i
$$
P=\frac{g h^2}{u^3}
$$
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,-e3x:3*son v0i/njlj jm pj d910stv a the percentage uncertainty is the power multiplied by the percentage uncertainty of the measurejj *dinmv 3e30l1-js 9j v:p/nt0oasxment. When measurements are multiplied or divided, the percentage uncertainties are added.
| 
Post time 2024-8-21 21:38:19