How to Tune a Guitar

This method usually results in a more accurately tuned guitar.

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Additive Light

Our eyes are sensitive to a very narrow band of frequencies within the the electromagnetic spectrum. This narrow band is referred to as the visible light spectrum.

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Bicycles

Video: The Physics of Cycling (5:50)

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Learn to Type

Learn to type correctly using this simple online game.

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Writing a Persuasive Letter

Essential Tips Keep it concise. Limit the length of your letter to one side of one page—or less than 500 words. Keep it courteous. Avoid personal attacks, insults or threats. Identify your topic. Clearly state your topic in the first sentence. Stick to your topic. In the rest of your letter, stay focused on this topic. Be persistent. If your first letter is ignored, follow up with at least two more letters, each time referencing the earlier letter(s), and politely requesting a response.

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Writing an Outline

Why Use an Outline? Outline are a quick and easy way to take notes. Outlines help you arrange your ideas in the best order. Outlines help you identify the most important ideas. Outlines are an easy way to share ideas with others. When comparing outlines, it’s very easy to see what missing or what’s different. Good outlines make it incredibly easy to write most excellently. Example Outline Introduction a. Really interesting idea that hooks the reader into wanting to read more.

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Eighth Grade Topics

1: Foundations of Algebra Vocabulary Absolute Value Additive Inverse Algebraic expression Base (of an exponent) Coefficient (of a variable) Constant term Exponent Integers Irrational numbers Like terms Multiplicative inverse Natural numbers Opposite numbers Order of Operations Perfect square Power Principle square root Real numbers Reciprocal Repeating decimal Square root Term Terminating decimal Variable Whole numbers Understanding and Skills Memorize multiplication up to 12 × 12 Memorize perfect squares up to 144 Working with Commutative, Associative, Distributive and Identity Properties Identifying types of numbers, including Natural, Whole, Integer, Rational, Irrational Converting between fractions, decimals and percents.

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Sixth Grade Topics

An overview of topics for a complete sixth grade mathematics program.

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Propagation of Sound G6

Main Ideas Vibrations cause waves of vibrations in a medium, and sound is transported by these vibrations. Sound requires a source, a medium and a receiver. We hear sounds because vibrations in the air cause our ear drums to vibrate. Resonance occurs when a object vibrates in harmony with a sound wave. Sound travels at about 343 m/s in air. Sound travels at different speeds in different mediums and conditions. Reflection phenomena (echos) are commonly heard with sound waves.

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Levers

There are three classes of levers, depending on where the load and effort are located compared to the fulcrum. Each type of lever has its own uses and advantages.

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