metric system and dimensional analysis

Metrics and Dimensional Analysis

Metric System

Metric System

• All units are multiples of ten

• Consist of base unit and prefix

SI units

• Internationally agreed upon units

• All scientists use these to measure

Dimensional Analysis

Dimensional Analysis

• Simple unit conversions; the idea of dimensional analysis

• Convert 2 feet to inches

• We need a conversion factor, a relationship between the units

Dimensional Analysis

• These both give us a relationship between in. and ft.

• We use D.A. to cancel units

Dimensional Analysis

• The units cancel out leaving only

• Giving us an answer of 24 in.

Dimensional Analysis

• Convert 48 inches to feet.

Dimensional Analysis

• Convert 5 days to hours.

Dimensional Analysis

• How many seconds are there in 4 minutes?

Dimensional Analysis

• Convert 27.2 cm to meters.

Dimensional Analysis

• Sometimes our conversion requires more than 1 step.

• Convert 1 Ms to hr.

Dimensional Analysis

• Convert 147 cm/s to m/s

Dimensional Analysis

• Convert 60 miles/hour to feet/second