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Unformatted text preview: Chapter 1: What is Science? PHYSICS – The study of matter, motion and energy. Measurement Means of quantifying the properties of an object. Requires BOTH a number and a unit. Fundamental Units of Measure: Length Mass Time Charge Measurement Systems: English System Used only in the US Uses inconvenient multiples. 12 inches = one foot 3 feet = 1 yard 1 mile = 5280 feet Standards are difficult to reproduce or are not consistent. Measurement Systems: English System Length: Inch- Foot- Mass Measurement Systems: Metric System Common system of measure for scientists of all nations. Based on multiples of 10. 1 m = 100 cm = 1000 mm Standards are consistent and reproducible. Measurement Systems: Metric System Length Meter – distance light travels in 1/299,792,458 th of a second Mass Gram – mass of one cubic centimeter of water Since the gram is such a small unit, the Kilogram (1000 grams) is taken as the base unit Time Second – based on the vibrations of certain atoms, (atomic clocks) Volume Liter or m 3 – based on units of length. 1cm 3 = 1 mL Measurement Systems: Metric System Prefixes are used to represent larger or smaller amounts Each prefix denotes a power of ten. See Table 1.3 on page 7...
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