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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
