Happy Holidays!

Over break, you should outline the Physics Talk that starts on page 498. If there is a word used that you don't know, you should copy the definition from side of the P.T. into your outline.

You should also read about your chapter challenge in chapter 5 and start planning it (use the rubric as well). By the time we get back, you should have at least a sketch of what you plan on building, including steps to completing it and materials needed. You may also, instead, start building your instrument.

Happy Holidays!!!

Wednesday, December 19

Complete your Phet Standing Waves Exploration packet.

Tuesday, December 18

1) Outline the Physics Talk which starts on page 486.

2) Answer the  Checking Up questions, and the What Do You Think Now questions.

Friday, December 14

Fill out the chart below (all information, including frequency ranges, can be found easily online). The last two rows are for you to choose whatever instrument you'd like.

Instrument	Family (string, brass, woodwind, percussion)	Size - Relative to other instruments in the same family (small, medium, large)	Frequency Range (Hz)	Soprano, Alto, Tenor or Bass sound?
Violin
Piano
Snare Drum
Trumpet
Oboe
Flute
Timponi
Tuba

Wednesday, December 12

On pages 778-779 of your textbook, there is a summary of all the topics you've read about in this chapter. We obviously did not talk about electromagnetic waves, so you don't have to worry about that for the test. Use your notes, your quiz and your textbook to study.

On pages 784-786 you will find a practice test - this is a great study guide for you! You do not need to know how to answer 13, 14, 15, 19-22. The answers are below.

If you need extra help, I'll be in early tomorrow morning.

Practice Test Answers:
1) d, 2) b, 3) a, 4) b, 5)d, 6)b, 7)d, 8)d, 9)b, 10)a, 11)a, 12)d

16) As the loop rotates, it will generate a maximum voltage and maximum induced current when it cuts perpendicularly through the field lines. Assume the plane of the coil starts parallel with the faces of the north and south poles of the magnet. As the loop rotates 90 degrees, the voltage and current with go to a maximum. When the loop to the 180 position, no field lines will be cut and hence, the induced current and voltage will be zero. The same cycle will happen at 270 degrees and then back to the original position. The graph should look like this:


17) A simple galvanometer consists of a coil of wire wrapped around a compass. As current flows through the coil, the compass deflects from its normal position to line up with the magnetic field of the coil.

18) a. Electromagnets can pick up mainly iron and steel
b. When the electromagnet has the current turned off, it stops being a magnet, and the steel or iron will drop.
c. The soft iron core is made from thousands of small metallic crystals called domains. Each domain is magnetic, but the point in random directions so there is no net magnetic effect. When an external magnetic field is supplied to the soleniod, many of the domains line up with the solenoid's field, increasing its strength tremendously.

Tuesday, December 11

Watch both of these videos:
http://www.youtube.com/watch?v=vdG7QooX1pg
http://www.youtube.com/watch?NR=1&v=iDH-RiDxqE4&feature=fvwp

Then, use what you have learned to answer the Inquiring Further question on page 755.

Next, watch these two videos:
http://www.youtube.com/watch?v=Tumb_MpFjDM
http://www.youtube.com/watch?v=g17f9J1-r-k

Make a list of the advantages and disadvantages to AC and DC current both on the national grid scale and in our homes.

Monday, December 10

Tonight you will outline the physics talk that starts on page 748. You only need to outline the 'Generating Electricity' portion, though you must read the whole thing. Then, you should answer the 'Checking Up' questions on page 751.

Thursday, December 6

Tonight: Finish your toy! When you're done, email me the video or upload it to youtube and send me the link.

Tomorrow: Use the Phet simulator to do the Investigate which starts on page 746. For questions #1-5 you'll use the 'Pickup Coil' tab. For question 6, you'll use the 'Transformer' tab. Then do this:
Faraday Lab

Over the weekend: Complete the written instructions for your toy.

See you Monday!

Lab

http://phet.colorado.edu/en/simulation/faraday

Wednesday, December 5

Answer 'What Do You Think' questions on page 746. Also, look into how your battery power motor is different from the electric motor we discussed in class. Write a small paragraph, or make a similarities v. difference chart, in your notebook explaining the distinctions between the two.

Tuesday, December 4

1) Your Chapter Challenge toy is due this Friday. Here is the rubric, for those of you who were not in class:

Chapter 7 Challenge Rubric

2) For tomorrow, you must complete the Essential Questions and Physics to Go questions 1-6, which start on page 742.

**Students who were on today's field trip are still responsible for tonight's homework!

Friday, November 30

You have two assignments for this weekend.
1) Outline the 7.3 Physics Talk, which starts on page 736.
2) Read through the Investigate, which starts on page 734. We will do this in class on Monday, so make sure you have your battery and magnet with you. This will become your toy motor! Spend some more time thinking about your toy, now that you know what the battery will look like. If you want to modify it, come prepared to do so on Monday!

Here are some toy videos from previous years:
http://www.youtube.com/watch?v=v9fAvmXu3LI
http://www.youtube.com/watch?v=D_oncWOp8HY
http://www.youtube.com/watch?v=cw3rBjt5cBU

Quiz

Guys,
Click the link below, it will take you to your Quia homepage. There is a quiz posted up there, you have until class time tomorrow to complete it. You have 35 minutes and one attempt. It's all multiple choice, true/false, etc. You should use the same username and password as last time.

Good luck!

http://www.quia.com/pages/jtanzman11/activephysics

Tuesday, November 27

Guys,
Make sure you check back here tomorrow for information about work due for class on Friday (including your online quiz). More details to come...

Monday, November 26

Complete the 'Inquiring Further' questions 1-3 on pages 732 and 733 of your textbook.

Tuesday, November 20

Finish the Physics to Go questions on page 732, numbers #1-6.

Happy Thanksgiving!

Monday, November 19

Finish your investigate questions. The link below is the simulator we used in class, feel free to use it to help you answer the questions.
http://phet.colorado.edu/en/simulation/magnets-and-electromagnets

Also, read the chapter challenge, which starts on page 710. Then, research toys that use electromagnets/motors. Make a list of at least 5 of these toys in your notebook.

Thursday, November 15

Outline the 'Electromagnets' Physics Talk, starting on page 727 of your textbook. Also, answer the 'Checking Up' questions.

Wednesday, November 14

On loose leaf, answer the following questions using your notes, textbook and the internet:

1) Do magnets have to touch each other in order to experience a magnetic force? Explain.
2) What is the difference between a permanent and a temporary magnet?
3) If I want to know the direction of a magnetic field around a permanent magnet, what should I do?
4) A strong magnet in a junkyard can lift a car; what does this tell you about the relative strength of the magnetic and gravitational forces on the car? What do you think creates this magnetic force?



Also, mess around with this (use all the tabs at the top - it's awesome!):
http://phet.colorado.edu/en/simulation/faraday

Tuesday, November 13

Answer 7.1 Physics to Go questions #1-5

Friday, November 9

Complete all of the following for Monday:

1) If you did not receive a √⁺  on your 7.1 outline, you should add to it/amend it appropriately (as per our discussion in class today).

2) Finish the Investigate B, if you have not already.

3) Answer the 'Essential Questions' on page 723 of your textbook.

Have a nice weekend!

Wednesday, November 8

Outline the 7.1 Physics Talk, which starts on page 717 of your textbook

Tuesday, November 6

Answer the following questions in your notebook, under the heading "Chapter 7, Section 1. What Do You Think?" :

1) How many sides does a magnet have? What are these sides called?

2) A compass is really just a bar magnet. What does that mean about the Earth? How does the compass know to point North?

3) Do magnets need to be touching one another in order for you to feel a force between them? How do you know? Give examples.

Wednesday, October 24

Homework for tonight: Answer, in your notebook, Physics to Go questions 1-4, 6, 8 & 9 on page 629 and 630.

Thursday: In class you will start by working quietly on a review worksheet, which will be collected by the proctor. When you are done, you should read the 'Reflecting on the Section and the Challenge' paragraph on page 628.

Based on the reading, and what you know about voltage, current, resistance and power, you will start to design your HFE home. Remember that you already have an appliance list in your notebook from earlier this year. Using the following website, http://www.energystar.gov/, look up the specifications (wattage, kw/hrs, etc.) required for the 5 appliances you want in your home. Keep this information in your notebook (title should be 'Chapter 6 Challenge'). Then, draw some rough drafts in your logbook of what you think the schematic of your house needs to look like in order to not go over the maximum allowed wattage.
**Revisit the chapter challenge explanation to figure out all the values are required for your home!

Friday and the weekend: Keep working on your schematic drawings for you HFE house.

Also, outline the 'Physics Talk' in section 6.5 (starts on page 633). Its REALLY LONG! Make sure you start working on it sooner, rather than later. Waiting until Sunday will mean a real headache (or a terrible outline!)

Monday, October 22

Complete all of the following tasks:

1) Complete the 'Resistance' column on the two charts you made over the weekend AND the chart you made today in class (use the equation we discussed at the end of the class today, R = V/I).

2) Graph the data you gathered in class today

3) Find the slopes of all three graphs (do the math in your notebook - show your work!)

Thursday, October 18

Using the Circuit Construction Kit (found under Helpful Links), build a one battery + one light bulb series circuit. Use the Voltmeter and Non-Contact Ammeter to measure the voltage drop across the bulb, and the current in the circuit. You will continue to add batteries and take readings until you can complete the following chart:

**NOTE: DO NOT FILL OUT THE RESISTANCE COLUMN**

Table 1. Comparing Voltage, Current and Resistance with Various Numbers of Batteries and Low Resistance Wires

Number of Batteries	Voltage Drop Across Bulb	Current	Resistance (Ω)
1	9.00 V	0.90 A
2
3
4
5
6

Then, start over (one bulb, one battery). Using the voltmeter, adjust the wire resistivity (found in the 'Advanced' panel) until your voltmeter reads 5.50 V (or as close as you can get it). Then repeat the process from above and fill out this chart:

Table 2. Comparing Voltage, Current and Resistance with Various Numbers of Batteries and High Resistance Wires

Number of Batteries	Voltage Drop Across Bulb	Current	Resistance (Ω)
1	5.50 V	0.50 A
2
3
4
5
6

Finally, you will make two graphs. Your first graph should be an xy scatter plot of Voltage vs. Current for the low resistance chart. Your second graph should be an xy scatter plot of Voltage vs. Current for the high resistance chart. Your axises should be labeled and should include units. Voltage should be on your x-axis and Current should be on your y-axis. Here are some videos of how to make xy scatter plots in excel: http://www.youtube.com/watch?v=-SeCPLC30_g&feature=fvwrel
http://www.youtube.com/watch?v=nnM-7Q6gmUA

Tuesday, October 16

Answer the 'What Do You Think?' questions on page 623. Also, complete a THOROUGH outline of the 'Physics Talk' on pages 625-625 in your textbook (do this in your notebook).


Here was yesterday's assignment for those of you who would like to complete it for partial credit:
Students should read "Reflecting on the Section and the Challenge" on page 620 of their books. They should then answer 'Physics to Go' questions 3-10, which can be found on pages 621 and 622. If a question has a circuit diagram, students should recopy the diagram into their notebooks before answering the question. All questions should be answered completely and thoughtfully.

Thursday, October 11

Complete the yellow (6.3) worksheet you got today in class. Also, study your electricity vocab and, series and parallel circuits in terms of voltage, voltage drop, current and power.

Tuesday, October 9

Read the 'Physics Talk' on page 617-618 of your textbook, and answer the 'Checking Up' questions (#1-4) on page 618 in your notebook. Add the new physics words to your electricity vocab list.

Friday, October 5

Use the circuit simulator we've been using in class (http://phet.colorado.edu/en/simulation/circuit-construction-kit-dc) to make several types of series and parallel circuits. Use the voltmeter and non-contact ammeter tools to find some patters between voltage, current and brightness of bulbs in each type of circuit. Then copy the Venn diagram below into your notebook AND fill it out.

Here's a sample parallel circuit, as well, in case you are confused:

Thursday, October 4

1) After today's discussion, if you need to, fix your bulb comparison chart that you copied into your notebook from page 609 of the textbook (from Tuesday's homework).

2) Answer all of the 'Essential Questions' on page 612. Do this on loose leaf - it will be collected.

Wednesday, October 3

Copy the following tables (with the titles) into your logbook AND complete them. You will notice that I have filled out one row in each table for you. Each of these tables is for series circuits only.

Table 1. Voltage Drops Across Light Bulbs in Series Circuits with Varying Battery Voltage

Battery Voltage (V = J/C)	Voltage Drop Across 1 Light Bulb	Voltage Drop Across 2 Light Bulbs	Voltage Drop Across 3 Light Bulbs
1V	1 V	0.5 V each	0.33 V each
3V
6V
9V
12V

Table 2. Power (in Watts) Across Light Bulbs in Series Circuits with Varying Battery Voltages and Currents

Battery Voltage (V = J/C)	Current (in Amps; A = C/s)	Power (Watts = J/s) Across 1 Light Bulb	Power (Watts = J/s) Across 2 Light Bulbs	Power (Watts = J/s) Across 3 Light Bulbs
1V	1A
1V	2A	2W	1W each	0.667W each
1V	3A
9V	1A
9V	2A
9V	3A