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 d j7svt x/5k8d 28wvtfkistadltqv5t0s k6d,ejh56 sh4 bz1 nce four times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is thhkj d4 qz160d5hb5s,lev st6te best estimate 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 (37.8mt5/uqn h 5 58mbqluv6 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the 5l/5 umq m5ubtn8vhq6correct answer.
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Post time 2024-8-21 21:38:19