Measurement and Experimental Error Overview
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UNIT 2 — Measurement & Experimental Error 2.1 Types of Observations Qualitative: non-numerical (color,
smell) Quantitative: numerical (25.4 cm) 2.2 SI System 7 Base Units:
m, kg, s, mol, K,
A, cd Derived units: m/s, m³, kg/m³
2.3 Temperature Definition: measure of average kinetic energy Absolute zero =
0 K = –273.15°C Conversions: K = °C + 273.15 °C = K – 273.15 2.4 Measurement
Rules Read at most half of smallest division Always include uncertainty 2.5 Errors
Random error: unpredictable variation Systematic error: consistent bias (e.g.,
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