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 distq63xx t.y,coe ngd7p(5r)ht -vctr 3sa5jziqb (vpvh2n,siva2 3)g + qnce four times. The readings are 37.8 cm, 37.9 cm, 38.1 cm, 38.2 cm. What is the best estimate 2sbvja q(+qn2)vv,i hgp iz53of 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 measuw 39xd 9grn iax96wg4*i yzi9xrements is 38.0 cm. The extremes (37.8 cm and 38.2 cm) are bg9gw9dni 9a6i x*xri4 3xwz y9oth 0.2 cm away from the mean. So C is the correct answer.
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Post time 2024-8-21 21:38:19