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 jsu:lwq3+t i 0tpl-ky z,n1rd :hat:
$$
P=\frac{g h^2}{u^3}
$$
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 pktv3- m zqq:p)2 mkau(ower, the percentage uncertainty is the power multiplied by the percentage uncertainty of the measurement. When measurements are multipquqm2 k-v:m ( 3k)ztpalied or divided, the percentage uncertainties are added.
| 
Post time 2024-8-21 21:38:19