1CHAPTER OUTLINE1.1 Standards of Length, Mass,and Time1.2Matter and Model-Building1.3Density and Atomic Mass1.4Dimensional Analysis1.5Conversion of Units1.6Estimates and Order-of-Magnitude Calculations1.7Significant FiguresPhysics and MeasurementANSWERS TO QUESTIONSQ1.1Atomic clocks are based on electromagnetic waves which atomsemit. Also, pulsars are highly regular astronomical clocks.Q1.2Density varies with temperature and pressure. It would benecessary to measure both mass and volume very accurately inorder to use the density of water as a standard.Q1.3People have different size hands. Defining the unit preciselywould be cumbersome.Q1.4(a) 0.3 millimeters (b) 50 microseconds (c) 7.2 kilogramsQ1.5(b) and (d). You cannot add or subtract quantities of differentdimension.Q1.6A dimensionally correct equation need not be true. Example:1 chimpanzee
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