Measurements, Conversions & Dimensional Analysis

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Presentation transcript:

Measurements, Conversions & Dimensional Analysis

International System of Units (SI Units) SI Base Units Time: seconds (s) Length: meter (m) Mass: gram (g) Temperature: kelvin (K) Amount of substance: mole (mol) Electric current: ampere (A)

Derived Units Combination of base units Volume: liter (L) or milliliter (mL) = 1 cm3 Speed: meters per second (m/s) Area: meter squared (m2) Density: grams per milliliter (g/mL)

Prefixes How many kilograms are in 2000 grams? 2000 g * 1 kg = 2 kg Symbol Factor of base Scientific Notation Example *kilo k 1000 103 kilogram (kg) deca da 10 decasecond (das) deci d 0.1 10-1 decimeter (dm) *centi c 0.01 10-2 centimeter (cm) *milli m 0.001 10-3 milliliter (mL) How many kilograms are in 2000 grams? 2000 g * 1 kg = 2 kg 1000g

How many millimeters are in 100 centimeters?

Dimensional Analysis Method of problem solving that focuses on the units used to describe matter Often use conversion factors to solve problems or other mathematical relationships (equation)

How many seconds are in 1 hour?

If a car is traveling at a speed of 10 m/s, what is its speed in km/hr?