PHY 101 1nd Edition Lecture 1 Chapter 1: Introduction OutlineII. FundamentalsIII. SI UnitsIV. History of Length, Mass and TimeV. Unit ConversionCurrent Lecture- Fundamental Quantities and Unitso Mechanics: 3 quantities1. Length (L)2. Mass (M)3. Time (T)o Can derive all other quantities from theseo Ex. V=(L)(L)(L)= volume- Defined by SI units (System International) – USE THESE ONLY!o Length= meter (m)o Mass= kilogram (kg)o Time = seconds (s)- lengtho redefined 3 times most modern definition found in 1983o modern definition: distance traveled by light in 1/299792458 s- masso defined by mass of platinum iridium alloy- timeo before 1960, defined as 1/86400 of the average solar dayo modern definition: the frequency of radiation from the cesium atom- Unit Conversiono Ex. feet meterso Conversion: 1 m=3.281 ft, 1 mile= 1609 m=1.609 kmEx. 1 ft= 1/ 3.281 m = 0.305 m since 1 m = 3.281 ftThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Therefore: 5.0ft + 6.0m = (5.0 x 0.305) + 6.0=1.52 +
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