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03 Significant Figures

# 03 Significant Figures - Success Criteria What you need to...

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1 Unit Conversion with Conversion Factors The diameter of the Earth is about 12,800 km. Write the diameter of the Earth using units of Gm. Gm 10 x 28 . 1 10 1 1 10 800 , 12 10 1 , 10 1 2 - 9 3 9 3 m Gm km m km m Gm m km Validate by UNIT ANALYSIS, i.e by cancelling units to assure that the answer has the correct units! Transform the equivalence statement into the unit conversion factor. 2 Convert 95 paras to pasos. (36.0 pasos = 136.3 paras) A) 360 pasos B) 25.1 pasos C) 630 pasos D) 42.9 pasos pasos paras pasos paras 1 . 25 3 . 136 0 . 36 95 Validate by (1) Unit Analysis (2) pasos > paras so the answer must be < 95

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2 4 01-2 Exercise 4a: volume of a diamond given the mass in carats and density in g/cm 3 units cancel and volume units end up in the numerator 4b) speed (mph) given time in min:sec and distance in furlongs 3 / 50 . 3 1 200 . 0 0 . 1 cm g carat g carat mph h s furlong mi s furlongs 7 . 37 1 3600 1 125 . 0 4 . 119 10 5 Important Resource:

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Unformatted text preview: Success Criteria What you need to be able to do on exams. On Bb in Course Documents 3 6 Supplementary Notes Posted on Bb in Course Documents Nature of Matter 7 Activity 01-3: Significant Figures in Data The interest on your loan is __________ about 8%. about 8.1%. about 8.05%. 4 8 01-3 Exercise 1f: How many sig figs are there in the number 0.005700? A) 7 B) 6 C) 4 D) 2 What about in 0.050700? 5 9 01-3 Exercise 4: What is the total mass of three people weighing 53 kg, 60.4 kg, and 75.67 kg. Explain the rationale for the number of significant figures in your answer. A)189.07 kg 5 sig figs because that is what I got. B) 189 kg 3 sig figs because 53 kg could be 52 or 54 kg. C) 189.1 kg it is more precise than 189 kg D) 190 kg 2 sig figs because 53 kg is only 2 sig figs 53 60.4 75.67 189.07...
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