Scientific Skills & Tools (id: 580592178)

本题目来源于试卷: Scientific Skills & Tools，类别为 IB物理学

[单选题]

A student is using the equation pV = nRT to solve for nn with the following percentage uncertainties in the measurements.

What is the percentage uncertainty in the calculated value of n?

A. 3%
B. 7%
C. 9%
D. 12%


参考答案:  C


本题详细解析:

To calculate $n$, the student would rearrange the formula to get

• $n=\dfrac{PV}{RT}$

In both operations, the percentage uncertainty must be added, therefore the correct answer is C (2 % + 6 % + 1 % = 9 %)

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