MY

Module 1

SI Units- International system of units

  • Length/Distance- Meter (m)

  • Mass- Kilogram (kg)

  • Time- Second (s)

Metric Conversions

  • Kilo- 10³

  • Hecto- 10²

  • Deka- 10

  • Deci- 10⁻¹

  • Centi- 10⁻²

  • Milli- 10⁻³

  • Micro- 10⁻⁶

  • Nano- 10⁻⁹

Scientific Notation Rules

  • All non zero digits are significant

    • 112 → 3 sigfigs

  • All zeros between non-zero digits are significant

    • 303 → 3 sigfigs

  • All zeros to the right of a decimal point are significant:

    • 10.0 → 3 sigfigs

  • Whole numbers with zeros to the left of a decimal point may be significant with appropriate information

    • 42,100 → 2 sigfigs

    • 100. → 3 sigfigs

    • Exactly 100 → 3 sigfigs

  • In decimals smaller than 1, the leading zero is not significant

    • 0.00234 → 3 sigfigs

  • In scientific notation the zeros are always significant

    • 2.00 × 10⁶ → 3 sigfigs

  • In performing multiplication/division, the number with the least number of sigfigs determines the sigfig of the final answer

  • When converting units the conversion factors are exact and don’t determine the number of sigfigs of the answer

Comparing different values

Percent difference- used when comparing any two numbers

  • | value A - value B| / average)

Percent error- used when comparing a number to an accepted value

  • |True Value - Measured Value| / True Value × 100%

Four Common Graphs

  1. Linear graph

  • Equation- y=mx+b

  • Slope- Δy/Δx

  1. Power graph

  • Equation- y=axᴷ

  1. Inverse graph

  • Equation- y= 1/xᴷ

  1. Root graph

  • Equation- y= k root x

Lab related info

Diameter vs Circumference

  • Have a positive linear slope

  • Pi is their slope

Area of a Circle

  • Area and radius squared have a positive linear slope of Pi

  • Area and radius have a power relationship