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Monday, January 27, 2014

By the end of the day today, IWBAT… Analyze characteristics of waves (velocity, frequency, amplitude, wavelength) and calculate using the relationship between wavespeed , frequency, and wavelength. Do Now: Calculate the speed of a periodic wave that has a wavelength of 3.0 m and a

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Monday, January 27, 2014

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  1. By the end of the day today, IWBAT… • Analyze characteristics of waves (velocity, frequency, amplitude, wavelength) and calculate using the relationship between wavespeed, frequency, and wavelength. Do Now:Calculate the speed of a periodic wave that has a wavelength of 3.0 m and a frequency of 4.0 Hz. Monday, January 27, 2014

  2. Do Now:Calculate the speed of a periodic wave that has a wavelength of 3.0 m and a frequency of 4.0 Hz. Sim Q. Calculate the speed of a periodic wave λ = 2.0 m and f = 3.0 Hz. λxf = 3.0 m x 4.0Hz = 12.0 m/s Monday, January 27, 2014

  3. By the end of the day today, IWBAT… • Analyze characteristics of waves (velocity, frequency, amplitude, wavelength) and calculate using the relationship between wavespeed, frequency, and wavelength. Why it matters in LIFE: We interact with WAVES every day: your music is delivered to your ears via sound waves. Waves even quake the earth beneath our feet. Why it matters in THIS CLASS:  Unit #9 Exam this Friday, January 31, 2014. BE PREPARED!

  4. Another Magic Triangle…

  5. Do Now #2:Calculate the wavelength of a water wave with a speed of 3.0 m/s and frequency of 4.0 Hz. (Answer in meters to the hundredths.) T.Q. Calculate the wavelength λxf = v→ v f = λ Monday, January 27, 2014

  6. Do Now #2:Calculate the wavelength of a water wave with a speed of 3.0 m/s and frequency of 4.0 Hz. (Answer in meters to the hundredths.) T.Q. Calculate the wavelength λxf = v→ v f = λ 3.0 m/s 4.0 Hz= λ = 0.75 m Monday, January 27, 2014

  7. Transverse Longitudinal

  8. Unit 9: Mechanical Waves The Unit 9 Cover Sheet goes into your journals to keep track of your completed daily work prior to the exam. Record all assignments and keep it together.

  9. C-Notes & Equation Practice! Monday, 01/27/14

  10. Mechanical Waves Equations • Use your Mini-Books for reference • Create a sample wave on your C-Notes and label all components. • Identify each component of the waveform • Solve the sample questions using wave equations.

  11. Y-axis= displacement, the distance of a particle from its equilibrium position • X-axis can represent either time or distance from a specified point within the medium. A displacement-time graph shows the displacement of one particle of the medium as time goes by. A displacement-distance graph shows the displacement of all particles of the medium at one instant in time. • A= amplitude, the maximum displacement from equilibrium of any particle • Crestand trough are the points of maximum displacement from equilibrium above and below equilibrium position respectively. • λ = wavelength, the distance between two consecutive identical points on the wave eg between two crests or two troughs. • Frequency = equals the number of waves that passes a given point per second. • v= velocity, the speed with which the energy is being transferred in the direction of motion.

  12. T.Q. • What is the amplitude of the pendulum swing based on the graph? • At what time will the pendulum be at a crest?

  13. T.Q. A • What is the amplitude of the pendulum swing based on the graph? 2.5 m • At what time will the pendulum be at a crest? 0.5 s

  14. T.Q. • What is the wavelength of the wave? • If the spring oscillates at a rate fo 4 times per second, what is the velocity of the wave?

  15. T.Q. • What is the wavelength of the wave? 1.0 m • If the spring oscillates at a rate of 4 times per second, what is the velocity of the wave? λxf = (1.0m) x (4/1) = 4.0 m/s λ

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