? Explain.
Figure Q1.5
? Explain.
Figure Q1.4
Figure Q1.3
The diagram does not indicate any position in time that should have been represented by numbers on the dots. Without numbers on the dots we cannot tell if the particle in the figure is moving left or right, so we can’t tell if it is speeding up or slowing down. If the particle is moving to the right it is speeding up. If it is moving to the left it is slowing down.
Part a
Zeroes before the decimal point merely locate the decimal point and are not significant. Thus, 310 has 2 significant figures.
Part b
Trailing zeros after the decimal point are significant because they indicate increased precision. Therefore, 0.00310 has 3 significant figures.
Part c
Zeroes between nonzero digits are significant. Therefore, 1.031 has 4 significant figures.
Part d
Just like in part b, trailing zeros after the decimal point are significant because they indicate increased precision.Therefore, 3.10×105 has 3 significant figures.
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