# Chapter 1A Physics and Measurments | Significant Figures

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Chapter 1.Physics & Measurement  NASANASA PARCS is an atomic-clock mission scheduled to fy PARCS is an atomic-clock mission scheduled to fy on the International Space Station ISS! in ##\$. on the International Space Station ISS! in ##\$.  %he mission 'unded (y NASA in)ol)es a laser- %he mission 'unded (y NASA in)ol)es a laser-cooled cesium atomic clock to impro)e the cooled cesium atomic clock to impro)e the  +(,ecti)es A'ter completin* this module you should (e a(le to   Name and give the SI units of the seven fundamental quantities.   Write the base units for mass, length, and time in SI and USCU units.   Convert one unit to another for the same quantity when given necessary definitions.   Discuss and aly conventions for significant digits and recision of measurements.     Name and give the SI units of the seven fundamental quantities.   Write the base units for mass, length, and time in SI and USCU units.   Convert one unit to another for the same quantity when given necessary definitions.   Discuss and aly conventions for significant digits and recision of measurements.  Measurements  Used to describe natural phenomena (mass, length…)    Needs defined standards (SI )     Characteristics of standards for measurement ! Readily available ! Some property that can be measured reliably !  ust yield the same results !hen used by anyone any!here   Cannot change !ith time 
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