Kognity IB Physics A.0 Measurements & Uncertainty (id: d630d3deb)

[单选题]
An experiment used ty)k ngc5kwbcl)nq7 1 v2hf; 3kg+qf0j +ht,t so measure the acceleration due to gravity produces the following rehfq ts+,gt0+j sults:
$\begin{array}{llllllllll}7.83 & 6.98 & 7.52 & 8.01 & 7.76 & 7.15 & 6.87 & 7.25 & 8.35 & 7.54\end{array}$
Which of the following statements is true about these data?
Are there random or systematic errors, both, or neither?
(Acceleration due to gravity, $g$, on Earth is usually taken as $9.81 \mathrm{~m} \mathrm{~s}^{-2}$ ).

A. There is a large random error, but no systematic error.
B. There is a large systematic error, but a small random error.
C. There are large random and systematic errors.
D. There is a small random error and no systematic error.


参考答案:  C


本题详细解析:
There is significant variation between the indivun q-jrq.cw5d s e0:mxg6y,);rzbjj4idual data points, suggesting a large random error. Also, the values, as well as the average value, are far from the actual valjd:ry5qeg b;,nx.wj)u -j q6 s0zrcm4ue of $9.81 \mathrm{~ms}^{-2}$, so a large systematic error appear to be present.