The general form of a unit conversion calculation,

UNKNOWN AMOUNT = INITIAL AMOUNT X CONVERSION FACTOR

**Memorize the SI Prefixes and Conversion Factors Table!!!**10^12 | 10^9 | 10^6 | 10^3 | 10^2 | 10^1 | 10^-1 | 10^-2 | 10^-3 | 10^-6 | 10^-9 | 10^-12 |

tera | giga | mega | kilo | hecto | deka | deci | centi | milli | micro | nano | pico |

T | G | M | k | h | da | d | c | m | µ | n | p |

*Base Units In The International System (SI)*

QUANTITY | WRITTEN UNIT | UNIT SYMBOL |

Length | Metre | M |

Mass | Gram | g |

Time | Second | S |

Amount of substance | Mole | mol |

*Some Important Equivalences*

1mL = 1 cm^3

1cm^3 = 10^3 L

1t = 10^3 kg

*Exercises*

1) How many micrometres are there in 5 cm?

(µm) – (m) – (cm)

# of µm – 5cm x 10^-2 m / 1cm x 1 µm / 10^-6 m =

**5x 10^4 µm**2) Express 8 kg in milligrams.

1kg = 10^3g

1mg = 10^-3g

(kg) –(g) – (mg)

# of mg = 8kg x 10^3 g/ 1kg x 1mg/10^-3g =

**8x 10^6 mg****now, a little science cartoon :)**

## No comments:

## Post a Comment