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Posts: 3561
12 years ago
A sewing machine needle moves with a frequency of 2.5 Hz. Approximately how long does it take it to move from the highest point to the lowest point in its travel?
A) 0.40 s
B) 0.10 s
C) 0.20 s
D) 0.80 s
E) 1.25 s
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Educator
12 years ago
C
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