What are things that travel by wave? Daily Work Organizer Friday Question of the Day: What do waves transfer? How do you identify transverse and longitudinal waves? Do Now: What are things that travel by wave? What do waves have to do with energy? Agenda: Homework Homework: Reading Log 14: pg 122-124 Test Corrections & Survey Finish worksheets

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Waves

Waves are all around us all the time, even if we can’t see them. Why do we care? Waves are all around us all the time, even if we can’t see them. Waves not only explain surfing, but they also explain earthquakes, sound, and one of the most mysterious phenomena on Earth-light

What do Waves Do? Move energy through matter or space

Two Types of Waves Mechanical Waves need matter (medium) to travel through Electromagnetic Waves can travel through empty space

Mechanical Waves water air solids Mechanical waves travel through mediums such as: water air solids

Mechanical Waves May be longitudinal Or transverse

Types of Mechanical Waves Transverse Waves – energy moves up and down or side to side while traveling forward Wavelength Amplitude Crest Trough How often = Frequency

Types of Mechanical Waves Longitudinal/Compression Waves – energy moves along the medium while traveling forward Wavelength How often = Frequency

Types of Waves: http://www.youtube.com/watch?v=Rbuhdo0AZDU

Mechanical Waves Has wavelength, frequency, and amplitude Transverse Longitudinal Has wavelength, frequency, and amplitude Energy travels forward but moves up and down/side to side Has wavelength and frequency Energy travels forward in pulses

Put the following waves under the correct category: A wave at a ball game Guitar string Slinky Flag waving in the wind Sound wave Shaking a rope Water wave

II. Mechanical Waves Slinky Sound wave Water wave Longitudinal Transverse Slinky Sound wave Water wave A wave at a ball game Guitar string Flag waving in the wind Shaking a rope Water wave

Electromagnetic Waves – Light!

Example 1 3 m 2 2 m 3 m v = f λ v =1.5 m/s

GUESS FORMULA: G = Givens - write them all down with symbols, numbers and units U = Unknown - write down the unknown with a question mark E = Equation - write down the equation or equations that apply in the problem solve the equation(s) for the desired unknown S = Substitute - substitute the given information into the solved equation S = Solve - solve numerically, paying attention to units identify the final answer by circling, boxing, or underlining it clearly check the final answer to be sure it makes sense