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Physics. The science that deals with the relationship between matter and energy. Measurement. Quantity. Something that can be measured such as… temperature, volume, length, mass. Measurement. Consists of a number and units. Examples: 27 ft, 45 liters, 74 F. Standard.
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Physics The science that deals with the relationship between matter and energy.
Quantity • Something that can be measured such as… temperature, volume, length, mass.
Measurement • Consists of a number and units. • Examples: 27 ft, 45 liters, 74F.
Standard • An exact quantity that people agree to use for comparison.
SI units • “Le Syste’me Internationale d’ Unite’s” • The standard system of measurement used worldwide.
Dimensional Analysis (Factor-Label Method) • The use of conversion factors and unit-labeled numbers to solve problems.
Conversion Factor • Number used to convert from on unit to another. • Equal to one.
Examples • How many cm are there in 25 m? 25 m 100 cm = 2500 cm 1 m
Examples • How many micrometers is 0.073 cm? 0.073 cm 1 m 1,000,000 m = 730 m 100 cm 1 m
Examples • How many seconds are in one day? 1 day 24 h 60 min 60 s = 86,400 s 1 day 1 h 1 min
Examples • Convert 50 mph to km/s. 50 miles 1.609 km 1 hour = .022 km/s hour 1 mile 3600 s