Doppler Effect

The Doppler Effect is one of my favorite things!

Notes: Doppler Effect

Homework is Ch. 14 (p. 505) Multiple Choice #12 + Conceptual #1, 7, 8

Sound Intro

Today we went over a bunch of stuff about sound:

Notes: Sound

Your only homework is to read section 14.2 in the textbook and then explain what you read to another person. We'll have some bellwork next week based on the reading, but otherwise I'm just trusting you to read it.

Extra Credit Quiz

Today you are taking a multiple choice quiz that covers everything up to (but not including) this unit. This quiz is a data-gathering tool for us teachers, so it isn't going to affect your grade negatively. Instead, I'll "grade" it like an AP test, and if you get at least a "3" (passing) I'll give you some extra credit. If you get a "4" or "5" I'll give you a little more. We are not talking about a lot of extra credit here.

Your real, unit test is the next time I see you. For the practice test and its key, see yesterday's blog post.

Wave Interference and Reflection

Today we talked about what happens when waves overlap or hit a barrier/change mediums.

Notes
Simulations:
Zona Land Education: Wave Interference I
Zona Land Education: Wave Interference II
Zona Land Education: Wave Interference III
PhET: Wave on a String

Homework: There is almost nothing to practice interference in the textbook, so your homework tonight is to play a game. Download the app Kerflux and get to at least level 30. Please note you do NOT have to pay anything for this game. If you do not have a device that can run Kerflux, that's okay too; I'm not actually checking this.

On Wednesday you will be taking a quiz about everything since August. This is a data gathering tool, so it will NOT hurt your grade. However, to encourage you to take it seriously, if you earn above a certain cut score I will give you extra credit.

Your unit test is on your next modular day. Below you will find a link to the practice test as well as a key.

SHM and Waves Test Practice

Solutions videos (note that the numbers of the problems have changed by the problems themselves have not):
#9
#10
#11
#12

EM Waves

Today was a half day, so we very briefly discussed a type of non-mechanical wave called an electromagnetic (EM) wave.

Electromagnetic Spectrum
United States Frequency Allocations (NASA)

Homework: p. 469 #43, 45, 46

Mechanical Waves

Today we introduced mechanical waves:

Here is a website with animations of the different kids of mechanical waves:

Acoustics and Vibrations Animations, Daniel A. Russell, Pennsylvania State University

Here is the stuff about earthquakes:
Types of Seismic Waves (L. Braile, Purdue)
Seismic Waves (YouTube)


Homework: Ch. 13 (p.469) # #41, 42, 44. Remember tomorrow is a half day.

Period of a Pendulum

Today we used your lab results to get the equation for the period of a simple pendulum. We also watched a fun pendulum video and mentioned physical pendulums.

Notes: Pendulums

In case you can't access the Powerpoint, here are the links for the videos we watched:


Harvard Natural Sciences Lecture Demonstrations: Pendulum Waves
Memo Akten: SHM #2 Excerpt
Somewhere in here we also talked about speed walking and pendulums, so here is a video of speed walkers.

Homework is Ch. 13 (p. 468) #34, 35, 39