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Warm Up What was one positive thing that happened to you over break?

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The rest of the year If you have not had as much success this year in this class as you would like, DONT GIVE UP 3 rd Quarter- Light, sound, waves, and energy 4 th Quarter- Electricity

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Chapter 5 Section 1: String Instruments Essential Question How do string instruments work? Content Objective You will understand how tension and string length affect pitch.

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What do you see? How do the blue men produce different sounds in the video?in the video

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What do you think? 3 min How do guitars work?

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Terms you need to know Pitch Tension

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Terms you need to know Pitch Tension How high or low a note is The tightness in an object

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Hypothesis: How does increasing the length of the string affect the pitch made? When the string gets _______, the pitch _________________________, because ________________________________. Length of StringPitch

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Warm Up-Complete and Draw Table When the tension of the string ________, the pitch will ____________, because _______________________. TensionPitch

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Materials 1 Clamp 1 String 1 Cup 1 Weight Setup the lab exactly as shown in the front of the room

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Roles 2 Persons in charge of setup and breakdown Recorder String plucker Cup mover Any extra people are recording- everyone needs the data at the end.

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Exit Ticket In lab I saw that as I increased string length, the pitch ________________. When I increased the tension, pitch ________________________________.

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Exit Ticket In lab I saw that as I increased string length, the pitch ________________.

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Conclusion In lab I saw that as I increased _________, the pitch also ___________. When I decreased __________, the _________ increased. _________________ pitch made ________ made _______

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Question? Why does a guitar make noise?

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Warm Up- write and fill in Sound is created by _____________________. ________ is an example of a high pitch sound. 3. When you ___________ the length of a string, the pitch______________________.

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Sound is made by what?

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VIBRATIONS! Something has to vibrate to make a sound

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The speed of vibration How fast something vibrates is called

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The speed of vibration How fast something vibrates is called frequency Units are 1/s (per second) Frequency and pitch are the same, the frequency determines the note we hear

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Frequency f= frequency T= tension m= mass L = length

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Put this equation into use When a 2 kg string has a length of 0.5 m and a tension of 2,458,561 N, what frequency does it make when it is plucked?

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Try it again Your 5 kg string has a length of 1 m and a tension of 5,475,811 N. What is the frequency the string makes when you play it?

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Exit Ticket We have looked at the physics of strings, how is it similar/different to drums?drums?

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Exit Ticket In lab I saw that as the string gets shorter, the frequency ________________. When I decrease the tension, the frequency________________ _______.

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Hypothesis- 7 minutes What happens to the pitch from the string as tension increases? As the tension in the string _______, _______________________________. You will need to create a data table with tension and pitch

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After the table is filled in Create a graph of Tension vs. Pitch Fill in the graph qualitatively with the data from your table. Question 1: Which is on Y-axis? X-axis? Question 2: What relationship do you see?

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Conclusion In todays lab, I saw that as tension __________, the pitch ______________. This is (similar or different) to yesterdays lab in that_______________ _________________________________.

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Physics Talk- Pages 486 -487 Checking Up Questions 1-4 You can work in a group, but everyone must have it down. You must get each question checked prior to moving on to the following question.

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Physics Talk- Pages 486 -487 Checking Up Questions 1-4 You can work in a group, but everyone must have it down. You must get each question checked prior to moving on to the following question. For example Number 1 When the tension of a string is increased, the pitch ________________________________. An example of a high pitch caused by tension is _________________________.

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Warm Up Watch this video, and explain how the guitarist produces the different notes. Watch this video

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Physics to Go Questions Pg 490 Questions 1-3, 6,7 Done in groups After each question, you must get it stamped. Tomorrow, each group will be responsible for reporting out their answer

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Exit ticket By comparing _______ to ________, it becomes clear that _____________. One similarity/difference is ________________. Their common characteristics include: _________, ___________, and ________________. By comparing _______ to _______________, we learn_________________ ____________________________.

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Warm Up When an object gets hot it gets larger. If you leave your drums out in a car on a hot day, what would you have to do to fix the pitch (to what it was before the heat affected it)?

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After the Quiz What do you think Now- How do guitars work? Setup the next section in your notebook for Chapter 5 Section 2- Waves

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Warm Up- 5 min What happens to pitch when you increase tension? How can you increase tension in a string? What happens to pitch when you increase length of the string? How can I change the length of a string?

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Warm Up- 5 minutes Get a textbook and open it up to page 480 Read The Scenario and Your Challenge In your journal: Jot down what you must do and any initial ideas

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The Rubric If the group is 3 people, then there must be 2 handmade instruments. If the group is 2, then you only need 1 handmade instrument. Minimum performance 2 minutes, max 4 minutes Pre-recorded performances must be on a DVD or Flash drive with all performers in the video.

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AMAZING http://www.youtube.com/watch?v=hHKwCZNu1Ms

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Student Examples How would we rate these using the rubric that you have?

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Form the group you think you want to work with Make sure you know your group mates will work you dont want to be stuck doing the group project by yourself. Think about songs that you like, what kind of instrument you might make, light sources you have Turn in one sheet at the end of class with your ideas