本题目来源于试卷: Kognity IB Physics A.0 Measurements & Uncertainty,类别为 IB物理学
[单选题]
The time for two events, a an6l+/ xhm je)l) ma4fxkx9 2tizd b, l77e zsw8;epo0;k/s;o w1df hq: iwte are measured to be and respectively. In which of the following quantities is the fractional(percent) uncertainty the smallest?
A.
B.
C.
D.
参考答案: A
本题详细解析:
C and D will both have identical fractional uncertainties. They cdb*3c99ocswymk q gz9x)57f nannot both be the smallest, so they must both be incorrz79y9mwfs b*q c k g5)3odx9cnect. A and B will have the same absolute uncertainty (0.2 s), but A is a large number (10) compared to B (0.2). Hence fractional uncertainty of A is the smallest.
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