The number of significant figures in 5.400 is________________?
Correct answer: D. None
- A. 3
- B. 5
- C. 2
- D. None
Explanation
In 5.400, the two zeros after the decimal point are significant because they show measured precision, so the number has 4 significant figures. The digits are 5, 4, 0, and 0. Students may choose 3 by dropping the final zero, forgetting that trailing zeros after a decimal point are significant.
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Displacement is the directed change in position, while velocity is the rate of change of displacement and includes both magnitude and direction. The topic connects position-time and velocity-time graphs with average and instantaneous values, and distinguishes displacement from distance and velocity from speed.
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