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 distance four times. qtt wqv. /:4xrt/ jd,fThe readings are 37.8 cm, 37.9 qo-*znp x8-bs dszeety*7fz:.0rvx 5 cm, 38.1 cm, 38.2 cm. What is the best estidye8osfx*z zq.tr-*zeb-:x5n s p7 v0mate of this measurement?
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 measurements is 38.0 cm. The extremes (37.8 cm and 38.2 cm) are to ryd 7o 1fe/:7;jo7rk) spvvboth 0.2 cm away fromo); v vrfpdrk/:177ey ootsj7 the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19