HP Cycle 42

🟢 8: M 6/1 - sound, reflection, interference, standing waves, resonance

Then, we'll play with slinkies again to see how waves reflect and interfere.  We'll learn about constructive interference and destructive interference.  We'll also learn about the conditions that might be present to create standing waves, and we'll learn about identifying nodes and antinodes. We'll learn about how superposition can result in beats.  We'll solidify our understanding about interference by completing Wave Superposition Worksheet (PH).  If you were not in class or need a refresher, watch the videos below:

Then, we'll learn about resonance - how we can apply more force to a mechanical system at just the right frequency to increase the amplitude of the wave.  Understanding resonance is very important to understanding many oscillating systems.  We'll look at some examples.  We'll practice our understanding of sound up until this point by completing Sound Worksheet (PH).  If you were not in class or need a refresher, watch the video below:

Vocabulary: superposition, constructive interference, destructive interference, standing wave, node, antinode

Presentation:  Waves & Sound (interference slides 29-36, resonance slides 37-42)

Handout:  Wave Superposition Worksheet (PH), Sound Worksheet (PH)

Homework:  Finish any of the worksheets you did not finish in class.  

🟩❗8: T 6/2 - resonance in strings

Today, we'll learn about how we can create music on string instruments including guitars, violins, pianos, etc.  We'll learn about resonance frequencies on strings and learn vocabulary and calculations for harmonics / overtones on strings.  We'll practice what we've learned with Resonance and Guitar Strings (TPC).  

Presentation:  Waves & Sound (slides 43-51)

Handouts:  Resonance and Guitar Strings (TPC)

Homework:  Finish any of the worksheets you did not finish in class.  If you were not in class or need a refresher, watch the video below:

💚 8: W 6/3 - resonance in pipes

Today, we'll look at resonance in pipes, and learn how our wind and brass instruments work:  flutes, clarinets, pipe organs, etc.  We'll compare and contrast pipes and strings.  We'll learn about harmonics / overtones in closed and open pipes.  Finally, we'll practice what we've learned by doing Resonance and Open-End Air Columns (TPC) and Resonance and Closed-End Air Columns (TPC).

Presentation:  Waves & Sound (slides 52-61)

Handouts:  Resonance and Open-End Air Columns (TPC), Resonance and Closed-End Air Columns (TPC)

Optional Extra Practice:  Sound Interference & Resonance Practice

Homework:  Finish any of the worksheets you did not finish in class.  Unit Assessment on Waves & Sound on Friday, June 12th.  If you were not in class or need a refresher, watch the videos below:

... and for a bit of fun...