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Published byLynne Cole Modified over 9 years ago
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The Language of Science How we communicate
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Describing an object Scalars Quantity that can be expressed with a single number 10 gallons, 30 miles, 20 years Expressed in magnitude only Vectors Quantity expressed with a number and direction Expressed in magnitude and direction 30 miles east, 24 m/s north
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How do we represent vectors? The arrow is called a vector. The length represents the magnitude of the objects speed. The direction represents the direction of the applied velocity.
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Examples Calculate the resultant velocity of Freda Flyer who normally flies at 100 km/h and then encounters a 10 km/h headwind. 100 km/H 10 km/h 90 km/h
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Adding Vectors 80 km/h 60 km/h Resultant = 100 km/h
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Vector Components Changing a single vector into it’s vertical and horizontal components is called resolution or decomposition. Vertical component Horizontal Component
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Solving for the resultant Pythagorean Theorem a 2 + b 2 = c 2 5 km/h (5 km/h) 2 + (5 km/h) 2 = _________
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Vertical and Horizontal Components
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Equations – What are they good for? Equations help us describe what happens and relationships. Equations are a shorthand form of expressing ideas. Equations can be expressed in graphical format.
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Direct Relationship A = k x B
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Inverse Relationship A =
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Power Law Relationship A = k B n
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Inverse Square Relationship A =
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Metric Prefixes Multiply Giga billion Mega million Kilo thousand Divide Centi hundred Milli thousand Micro million Nano billion
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Homework Read Chapter 2 4 definitions
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