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Chapter01

# Chapter01 - The answer should be 5 Units SI Système...

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Chapter 1: Introduction

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4. Scientific Notation and Significant  Figures Significant figures : all the digits that are known accurately + one estimated digit
Rules Nonzero digits are always significant. Final or ending zeros to the right of the decimal point are significant. Zeros written to the right of the decimal point for the purpose of spacing the decimal point are not significant. Zeros written between significant figures are significant. Examples 409.9 s ( ), 0.058700 cm ( ), 9500 g ( ), 950.0 × 10 1 mL ( ) 0.0001054 kg ( ), 0.005800 cm ( ), 602000 s ( ) When ambiguous, use the scientific notation.

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Significant figures in calculations Addition, subtraction Multiplication, division Round the answer to the shortest number of significant digits in the numbers you are multiplying or dividing. 28.84 ÷ 6.2=4.651612 (in your calculator)

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Unformatted text preview: The answer should be _____________ 5. Units SI ( Système International (french)) unit (or MKS unit) Time in s (second) Length in m (meter) Mass in kg Conversion of Volume 255 mL of water. What is the volume of the water in cm 3 and m 3 ? 6. Dimensional Analysis Dimension : basic types of units, such as length, mass, and time. [M], [L], [T] 1 N= 1 kg m/s 2 : [M][L][T]-2 An equation must be dimensionally consistent (be sure you’re “adding apples to apples”). x=vt : “Have no naked numbers” (always use units in calculations) except the ratio. 9. Graphs Please read Textbook page 14-15. It would be helpful when you do the labs in Phys2215 class. Note in finding the slope: Do not choose two data points to find the slope....
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Chapter01 - The answer should be 5 Units SI Système...

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