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. The readings apjy ( h5hpnbcni.1gn* u:s50+,g6k llcy l3ayre 37.8 cm, 37.9 c i4:a u+q;r d. arbk5qoyq;k:bm, 38.1 cm, 3:;yu;a q r:a.ikbqbdq+ k5 r4o8.2 cm. What is the 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 38ep ,ae6l.ba 9k)ub 6gb.0 cm. The extremes (37.8 cm and 38.2 cm) are both 0.2 cm away from the mean. So C is the correct answer.ea. 66b9ug,)bbap kle
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Post time 2024-8-21 21:38:19