The length of a rod measured as 15 cm using a meter rule is best reported as:

University of Ilorin PHY107 2020 past question

1. $(15.0 \\pm 1.0)$ cm
2. $(15.0 \\pm 0.1)$ cm
3. $(15.0 \\pm 0.05)$ cm
4. $(15.0 \\pm 0.5)$ cm

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