Resonance & Hearing (Wed&Thu)

We're going to look a bit more into this idea of the relationship between how long each vibration takes (period) and the number of vibrations per second (Frequency)

Start Wednesday by drawing a waveform with four antinodes, and label at least one wavelength and amplitude.

Remember, DO NOT HIT THE TUNING FORKS ON A HARD SURFACE!!! (just a gentle tap on something soft like your rubber shoe sole)

In Logger Pro, hook up the microphone to CH1, OPEN, PHYSICS WITH VERNIER, 35MATHEMATICSofMUSIC, and capture a screenshot of the sound from a tuning fork.  Use the graph to determine the period of the wave (or do 10 and divide?), and then figure out how many of these wavelengths go by during each second.  How does that compare to the number stamped on the tuning fork?  Want more help getting connected?  Click HERE

Look around at some other tuning forks, what do you notice about the ones with a higher frequency?

Just about everything has a natural resonant frequency, here's what might happen if you forget about that when building a bridge...



This resonance phenomena also applies to how we hear




And just in case you were wondering why we were getting dizzy in the previous unit(s), here's an explanation of how balancing works (and how momentum can cause dizziness!)

Testing Palooza is upon us!

So a bit of AIMS this week (mostly the bio students), with blocks on Thu and Fri.  Next week is our only "normal" week during APRIL, and then we get into the crazy AZMERIT testing, of M/T and R/F 75 minute blocks with super short WED schedules.  Check your emails soon for the actual schedule.

In the meantime, we'll keep exploring this sound and waves stuph - Work on Canvas #11 (and anything else you need to get done)

Thursday & Friday

Check your email for the etext for "The Physics of Music and Musical Instruments" - Use that to help you as you work through Canvas #11 parts 1-3 (and higher if you wish!)

Friday is a work day!

A few cool things about sound...

Your brain takes the input from your ear and looks for patterns, here's a visualization of what that might "look" like inside your mind...


This pattern recognition is used in music to combine sounds in pleasing (usually) ways - especially in making CHORDS - which are used often by songwriters.  The video below shows how just four basic chords make up the backbone of a ridiculous number of popular songs (perhaps you'll write the next hit?)

Do You Hear That?

It's the SOUND of the fourth Quarter!  Let's make some WAVES before we learn some SHOCKING truths!

Welcome back from break - hopefully yours was interesting and restful!

Today start with your old group and coordinate your assignment #7 in Canvas - Those who finish early can start working on #9.

Then it's New Group time, and time for some new questions... :-)

midterm postponed to phriday

Something has come up, Mr.C won't be able to make it in today, so the midterm is pushed to tomorrow and today is a work day!

Fizziks is Phun!

Learning about conservation of angular momentum firsthand!

Week 9 - Spring Cleaning Time!

Phun stuph @ CnC - well done peeps, good data, good competition, good sportsmanship, and phun!

• This week we need to clean out the cobwebs, check the board for specifics, and:
• Turn in your CnC Stuph
• Give your tennis ball launchers a good home
• Learn more about that torque and angular momentum stuph
• Take a midterm
• Polish any other portfolio submissions!

Metro makes it three years in a row!

of having the most phun @ Physics Day (and we did ok in the competitions too!)

Castles and Coasters!!!

Here's everything you need to know!
http://puhsdphysics.weebly.com/

Remember - don't be late for your event!
10:00 Mousetrap cars
10:30 Paper Tower, Gumdrop Bridge, Egg Drop, Trivia, Mystery Box
11:30 Broom Bowling, Paper Airplane, Bernoulli Ball, Tangrams (it might be OK to be a little late for this time slot except for paper airplanes, since the other teams have to take turns, just check in with the event hosts)

To practice making measurements (1 event, 1 data set, and have phun!)

You spin me right round...

Grab a meter stick, can you balance it on one finger?

Oh yeah?  Can you use your mental prowess to rank the mystery masses from low to high mass?  (A-H), check the Phet Sim "Balancing Act" (Click on HTML5 not RUN - the #s are different...)

Oh, and it would be awesome if...