Mon Feb 101. TEST (earthquakes moved to Sound test)

2. Asst: (a) Guided notes on SOUND

3. Need to turn in

• All self-check questions

• ALL Handouts

• Anything else?

IT IS EXTREMELY IMPORTANT YOU

ARE IN CLASS (ON TIME) THE

NEXT 2 DAYS AS WE START SOUND!!!

Tues Feb. 11

1. Any more waves handouts in your binders? Binders due Friday

2. Lecture Notes/demos3. Asst: Chapter 15 concepts: (listed on ½ sheet)

• p410 #12-13, 15-17

• p419 #22-23, 28

• p424 #32, 34-38, 41, 43-45, 47, 49

http://ca.pbslearningmedia.org/resource/phy03.sci.phys.energy.doppler/stellar-velocity-the-doppler-effect/

Binders due Friday

Wed Feb 12

1. Finish Lecture Notes/demos

2. Bill Nye – fill in your lecture notes with anything we missed …

3. Asst: Chapter 15 problems: (listed on ½ sheet)

(note – you need #3 of Guided Notes, which says: vsound increases 0.6 m/s per 1ºC, and has some common speeds of sound from p.405)

Page 424 #52-59, 60a, 61a, 62, 63a, 65, 74, 77a, 79, 88, 90

Page 429 #1-3, 6

http://video.google.com/videoplay?docid=-7765557442856739526

Mythbusters showing glass CAN be broken...

Binders due Friday

Thurs Feb 131. Login immediately; come back and turn in …

• book concepts / problems - any quick questions about them first?? (we’ll go over all later)

• Guided notes

2. Finish Bill Nye3. Out folder .... start Sound CPU’s – speakers

should be ON, but NOT too loud!4. Asst: FRONT = Medical Ultrasound AND BACK

= notes on “The Rumble of Destruction”• (BOTH due tomorrow; may use wksht

front & back on next test IF turned in tomorrow!)

• Along with Earthquakes HW, and the next 2 days HW as well.

Binders due Friday

Fri Feb 14

1. Login immediately; come back and turn in …• Med Ultrasound & “Rumble” HW questions/notes & reading packets (must

be turned in NOW to be able to use on the next unit test!)

2. Quick sound review (see next slide)3. Work on CPU’s (careful on sound volume!)

• Did you: (a) email your teacher waves docs 2-4 and (b) email home both partners Waves excel sheet to print & turn in Tuesday?

• On sim 3, make sure you know the beats graph & concepts!• On simulations 4 & 5, note that FREQUENCY/pitch is constant when the

medium changes, and that wavelength and velocity vary directly when the medium changes; and that sound is a mechanical wave, which means????

4. BINDERS DUE!5. HW: “Good Vibrations” questions (may

use wksht on next test IF turned in Monday!)

Tuesday Feb 18(Mon = Holiday)

1. Binders! …2. Login immediately; come back and turn in …

• Acc Eng. HW questions & reading packet (must be turned in NOW to be able to use on the next unit test!)

3. Go over Waves tests!!!– Get out a piece of paper…

4. Work on CPU’s (careful on sound volume!)• On sim 3, make sure you know the beats graph & concepts!• On simulations 4 & 5, note that FREQUENCY/pitch is constant when the

medium changes, and that wavelength and velocity vary directly when the medium changes; and that sound is a mechanical wave, which means????

5. HW: Acoustical Engineering questions (may use wksht on next test IF turned in tomorrow!)

Wed, Feb 19

1. Login immediately; come back and turn in …• Good Vib. HW questions & reading packet (must be turned in NOW to

be able to use on the next unit test!) 2. Last Day on CPU Sims - Read new Handout!!!3. Asst (A): go back & fill in all the rest of the CPU worksheet4. Asst (B) Do “redos” of following book problems:

– Page 398-399 #82 and 93 (from ch14, w/ “parts” of wave given)– Page 425 #53-56, 65, 74

5. Asst (C) EXTRA CREDIT IF parts A & B are done: Find one really cool sound or light clip on internet. Email your teacher your name, period, the URL, AND a description in the email of what the clip is AND how it relates to: Ca State Physics Standard 4f. Students know how to identify the characteristic properties of waves: interference, beats, diffraction, refraction, reflection, Doppler effect, and polarization. (Note that yours cannot be the same as another student’s to get the extra credit!)

6. HW Thursday night: (a) Review wksht (b) Print off Study Guide

Thurs Feb 201. Movie – Hearing (take notes on blank sheet of paper)2. Resonance & Speed of Sound Minilab (data & analysis)3. HW Thursday night: (a) Review wksht (b) Print off Study Guide

HW From Wednesday was:Asst (A): go back & fill in all the rest of the CPU worksheetAsst (B) Do “redos” of following book problems:

– Page 398-399 #82 and 93 (from ch14, w/ “parts” of wave given)– Page 425 #53-56, 65, 74

Asst (C) EXTRA CREDIT IF parts A & B are done: Find one really cool sound or light clip on internet. Email your teacher your name, period, the URL, AND a description in the email of what the clip is AND how it relates to: Ca State Physics Standard 4f. Students know how to identify the characteristic properties of waves: interference, beats, diffraction, refraction, reflection, Doppler effect, and polarization. (Note that yours cannot be the same as another student’s to get the extra credit!)

Redos Page 398-399 #82 and 93 ANSWERS: 82:  3.6 m/s; 93:  0.72 sec, 1.4 Hz

Test Monday!

Fri Feb 21***If you were absent/late: I must have any Earthquakes,

Acc Eng, Med Ultra/Rumble, and Hearing HW TODAY for you to be able to use it on the test!

1. Go over:• Review Wrksht• Book Problems (CONCEPTS; questions on prob’s first time &

redos)• CPU wrksht• Guided Notes

2. Look at some Video clips if time3. Asst: study for test!!

• Read Study Guide!!• Study Lecture Notes & Essay questions• Review wrksht, Bk Concepts & problems• Guided Book Notes, CPU sims

Redos Page 398-399 #82 and 93 ANSWERS: 82:  3.6 m/s; 93:  0.72 sec, 1.4 Hz

Test Monday! Copy both days!

• sound is a wave + waves concepts• it is a longitudinal or pressure wave

(“longitudinal” means “parallel” to direction of wave)

• with compressions & rarefactions (like a bunched slinky)

• it is produced by a vibrating object • what specifically produces sound in

voice & certain instruments (Examples: vocal cords, lips, reed, etc)

• it is a mechanical wave (needs a medium - no sound in a “vacuum” / outer space)

• sound travels fastest in solids, then liquids, then gasses

– (but slower in more dense gasses!)

• sound is slower than light (always!)• “pitch” means frequency, other

frequency words (tone, note, etc) • “loudness” means amplitude/energy• … measured in decibels, which is not a

linear scale• “echo” means reflection• how length of tuning fork dictates pitch

(determines length of standing wave that fits, & thus frequency),

– slide trombone, pipe organs, etc• sound also diffracts & refracts (rules?)

• timbre/consonance/dissonance – define• ear is human detector of sound; 3 parts

(x2 subparts), what each part does, damage to little hair cells that causes hearing loss

• Doppler shift: – when higher pitch– when lower pitch– pitch doing really– can use to determine speed of

moving source (there’s a formula)– (radar, stars moving away = redshift)

• Resonance & natural frequency– examples (tuning forks & pith ball ,

wine glass & opera singer, marchers across bridge, Revolution at Great America, swings, Tacoma Narrows Bridge, bee and pollen in flower)

• Beats: – caused by 2 frequencies close

together– but effect in loudness/amplitude– hear loud-soft “wobbling”– subtract to get beat frequency– Wa or Waaaaahhhh closer tuned?

Mon Feb 24th

1. Sound test ***(may use Earthquakes notes, Acc Eng wrksht, Med Ultrasound wrksht (& Rumble notes), Good Vibrations wrksht – for the back page of the test only)

• Turn your work packet back in after the test!

2. Asst: regular notes pages 430-451 (write page numbers of each page before you take the notes for that page; there is no wrksht for this)