Kognity IB Physics A.0 Measurements & Uncertainty (id: b56f9bbaf)

[单选题]
The masses and weights of different objects are independentykansa 89a 9dn 6)m mytp-,+woly measured. The grap9ma a+ptn-) do wk9snym ,ya86n, mpfkw wteelyz 0t:u1bm.+1d1v1qs .d4 xp/ h is a plot of weizep,..mepsq 411tt0kvd ywuwxd1+ bn/ :lf1mght versus mass that includes error bars.

What do these experimental results suggest?

A. The weight of an object is inversely proportional to its mass.
B. The measurements show a significant random error but small systematic error.
C. The measurements show a significant systematic error but small random error.
D. There is no correlation between the weights and the masses of the objects.


参考答案:  C


本题详细解析:
We know that the line should, theoretically go throuhnu daxceo t34 lcs (+skrmv4 f6n2 j-.s0h3b(gh (0,0) as mass and weight ar. 3j4s2 al-o hs 3enft(brc ksm 0udcnx(v6+h4e directly proportional. However it does not, so there is a systematic error. On the other hand the points all sit on a straight line which shows there is no appreciable random error. Hence C is correct.