Kognity IB Physics A.0 Measurements & Uncertainty (id: 87ba97ed9)

admin

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. Thenc4y.c mq0.qyx*k3eq readings are 37.8 cm, 37q7e1nrfw +;20 ,ueqng umjw m(.9 cm, 38.1 ue m u qw( +;jq,mgn0ewr21n7fcm, 38.2 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 38.0 cm. The extremes (37.8 cm an s,u9saxw;o)thlx4fl */yb 2nd 38.2 cm) are both 0.2 cm away from the mean. So C is the corrl9fb/l2;*toy,sw4xux anh)s ect answer.