This forum topic is for students to self-organize study groups, etc.
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For uncertainty questions, delta v depends on the part after the ±. So in the case of your example, 23 ± 0.1 m/s, just multiple the uncertainty part (± 0.1 m/s) by two as the possible values is up and down at 22.9 m/s and 23.1 m/s.
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