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 su/ v s4rmmfg26hownyfpy lrmo ; 8fhu);6nlyei(14 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 percentage uncertainty ie(5.dccd7,sqhs 1r9e yi,qj is the power multiplied by the percentage uncertainty of the measurement. When measurements are mu.e(sshiec1ri cdy 79,,q 5jq dltiplied or divided, the percentage uncertainties are added.
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Post time 2024-8-21 21:38:19