Tues April 3, 2019 Do Now: What do waves transfer? By the end of the day today, I CAN… Calculate wave speed and describe different types of waves and define a wave and the properties of a wave. Explain what determines the frequency and velocity of a wave. Solve a basic wave problem. Do Now: What do waves transfer? What does pitch refer to? What part of a wave refers to the loudness of a sound? Tues April 3, 2019

Tues April 2, 2019 Do Now: By the end of the day today, I CAN… Calculate wave speed and describe different types of waves and define a wave and the properties of a wave. Explain what determines the frequency and velocity of a wave. Solve a basic wave problem. Do Now: 1. A slide whistle is playing at 100Hz in room temperature. If it’s length is 30 cm, what velocity is the sound? 2. Beats can be heard when two tuning forks do what? Tues April 2, 2019

Wed April 3, 2019 Do Now: By the end of the day today, I CAN… Calculate wave speed and describe different types of waves and define a wave and the properties of a wave. Explain what determines the frequency and velocity of a wave. Solve a basic wave problem. Do Now: 1. Turn in your Doppler and Standing Wave sheets. 2. Get a calculator and pencil out. 3. What is the relationship between frequency and period? Wed April 3, 2019

By the end of the day today, YOU can … Calculate wave speed and describe parts of a wave. Why it matters in LIFE: We use waves for our cell phones use, microwave ovens, and to listen to the radio. Why it matters in THIS CLASS: The ideas are practical physics.

What it might look like on a test: It takes three seconds for a wave to go by. What is the frequency?

Agenda + Announcements Do Now/Attendance 5 min Legend of the Week Waves Notes 10 min Work it Out Do the Wave/Slinky 25 min

The Plan 1 Go over test 2 PPT Assign Reading Ch 14 and 15 2 PPT Intro to Waves, Digital Hwmk, Calculations 3 Standing Waves and Sound and Doppler 4 Instruments 5 Instrument Creation 8 Waves Sound Review 9 Go over Review Waves Quiz 10 Light 11 EMS 12 EMS activity

Legend of the Week I was born on April 22, 1904 in New York City I graduated from Harvard summa cum laude with a degree in chemistry  In 1939 he and his student, Hartland Snyder, predicted the existence of black holes. “There are children playing in the streets who could solve some of my top problems in physics, because they have modes of sensory perception that I lost long ago.” His most famous paper was co-authored by Max Born and explained the separation of nuclear motion from electric motion in the mathematical treatment of molecules. Father of the atomic bomb President Franklin Roosevelt established the Manhattan Project in 1941 and I was appointed its director in 1942

Who am I? J.Robert Oppenheimer

Unit: Waves and Sound

By the end of today, I CAN… Tue, 4/2/19 Standards SC.912.P.10.20, SC.912.P.10.18, SC.912.P.10.21: electromagnetic waves, electromagnetism, wave calculation, Doppler. system By the end of today, I CAN… Describe wave forms and calculate wave speed. Essential Question: What are types of waves and how fast are they moving? Topic: Waves Put this into your table of contents!

Waves are everywhere in nature stadium earthquake waves on a string slinky etc Sound waves light waves radio waves microwaves water waves sine waves

fast slow Waves Intro Video https://www.youtube.com/watch?v=RVyHkV3wIyk fast slow

Bellringer 3/14 1. In yesterday’s activity, what could our wave maker do to change the velocity of the wave?  2. What is the frequency, in Hz, if 4 waves go by in 1 second? fast slow

Waves Definition Types Parts Properties

2. Types Transverse: The medium vibrates perpendicular to the wave’s motion

Transverse or Longitudinal?

3. Parts of a Wave amplitude depends on wave energy! Crest Amplitude: the maximum distance the wave moves away from its equilibrium position. Crest units: meter equilibrium position Trough amplitude depends on wave energy!

4. Wave properties Wavelength length of a single, complete wave l definition variable unit Wavelength length of a single, complete wave l meter (m) Frequency number of cycles per second F=1/T f Hertz (Hz) Velocity the velocity of a wave v m/s Period Time for one wave to pass T=1/f T Second (s)

3. Wave Properties Wavelength () units: meter equilibrium position

4. Wave properties f = cycles/sec f = 1/3 = 0.33 Hz f = cycles/sec It takes three seconds for a wave to go by. What is the frequency? A runners legs go back and forth 16 times in 10 seconds. What is the frequency? Cycles: 1 Seconds: 3 f = cycles/sec f = 1/3 = 0.33 Hz Cycles: 16 Seconds: 10 f = cycles/sec f = 16/10 = 1.6 Hz

v = f  4. Wave properties v = x / t We can use what we know to determine how fast a wave is moving. Velocity formula? v = x / t v = f 