本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty，类别为 IBDP Physics
[单选题]
A student measures a distancelif 7s xaeuf j+ec55 *f-:zre- sgy8n6 four times. The readings are 37.8 cm, 37.9 cm, 38h rk zxuss0 8 e+f(pf.5v,n.jn.1 cm, 38.2 cm. What is the best estimate of this m sv e.h.jf,z5kr+( x0n8psf uneasurement?
A. $37.8 \pm 0.2 \; cm$
B. $37.8 \pm 0.4 \; cm$
C. $38.0 \pm 0.2 \; cm$
D. $38.2 \pm 0.4 \; cm$
参考答案: C
本题详细解析:
The mean of the measur2cng;4oq . gmeements is 38.0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the 2e.c4q ; gmnogmean. So C is the correct answer.
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Post time 2024-8-21 21:38:19