DR. SHIELDS' CLASS

Vertical Ball Toss (mac)

2D Ball Toss (mac)

Today we celebrated the last day that the entire class would have together. Some people brought in some amazing food and we all just relaxed and had fun together.
We played a fun game called geoguessr where google maps will put you in a random place anywhere in the world in street view and you have to guess where you are.
Here’s a link to the game: http://geoguessr.com/
We also played a game called world “The Traveler IQ Challenge” where you have to try to guess exactly where certain cities are on a blank world map.
Here’s the link for that: http://www.travelpod.com/traveler-iq

Here are some things to keep in mind…
- two circuit labs
- one quiz online

- optics homework

- a project due on the day of the final
- a final June 5th

Here are some motivating images to get you through it all!!

And now we leave you with an aweful, overused physics joke…

Good luck everyone!

Love,

Caroline and Sydney

So nothing much really happened last class because there were only four of us in class. Because there were so few of us we really just played around with dry ice and melted a penny. Hope ya’ll folks exams went alright. Also, remember to take the online quiz.
Below are some fun dry ice links

http://www.stevespanglerscience.com/experiment/awesome-dry-ice-experiments

http://www.continentalcarbonic.com/dry-ice-experiments.html

Nicholas and Henry

Lots to do before the end of the year.  I think this is everything (on top of the 4th quarter assignments already due) you will need to turn in.

• Advanced Circuits homework problems (Due 5/8; in the usual place)
• Advanced Circuits Lab
• Super Advanced Circuits Lab
• Magnetism quiz (It’s up.  The quiz code is the Preston Bodos phone number; no area code or dashes.)
• Last test (coming soon)
• Optics homework assignment (PDF version) (Complete with one other person and put in the Dropbox.)
• Final Project (half of your exam)
• Final Exam (unless you’re exempt)

Optional: Circuits Lab – Uber Advanced Circuits

The quiz is now posted.  The quiz code is the Preston Bodos phone number (no area code or dashes).  You are on your honor to take the quiz closed notes, without outside assistance, and in under an hour.  Things to review before you take the quiz:

• The circuits and circuit components in the Advanced Circuit Lab and Super Advanced Circuit Lab
• The Slinky Lab
• The equations below and what they mean
• The Magnetism homework questions
• Blog posts about magnetism and circuits
• Don’t worry about Ohm’s Law, parallel, series, etc. for this quiz

Hey, Jonathan and Matt here.

To start our class Dr. Shields showed us how his iPad/iPhone has a better B-field sensor than the devices we previously used in class during our lab. The B-field sensor on our iPhones is used as its compass, but through a simple app it can be converted to measure a B-field. As it turned out, the Apple product proved to be much more accurate.
We then discussed how a DC motor works.

What kind of forces(in what direction) will the wire loop in this picture experience?

The picture above will revolve in a clockwise direction. Since electromagnetic b-field travels in a north to south orientation, the wire in question will experience opposing forces on opposing sides because of the different direction of current flow, causing the clockwise rotation. Then the currents and forces will be switched when the contacts change brushes causing the constant motion.

Hey guys, Gabi and Pearl here. Today in class we began by reviewing the symbols for a voltage source, resistor, capacitor, diode, LED, transistor and a transformer. Check out the picture of them below…

The rest of class we worked on a circuit lab with circuit boards..which look super confusing >>>>>

Don’t forget to come in whenever you can to make up the labs if you miss class because of an exam AND don’t be silly and procrastinate on your final project, start now!!!

GOOD LUCK on your exams, don’t forget to breathe! Maybe this will help.. 

blog time with jacob and trevor

the things today that were done by dr shields physics class include all of the following:

number one) work on circuit lab from last class

200 in one electronic project lab

meanwhile finn played tron

Physics Blog 5/1/13

Hey y’all it’s Rowan and Huyler! If you missed this class this is all we did.

Resistor: Makes the current have a harder time moving around the circuit.

Diodes: stops the flow of current, made of mostly silicon

Transistor:

Take 3 silicon chunks and form a semi-conductor. The transistor does not allow current to flow between the N-doped and P-doped (negative and positive) silicon sheets, but by adding the B wire (base) connected to another energy source, the current will be able to flow.

Speakers:

Speakers are made using a magnet, diaphragm, and coil of wire to create sounds. The coil, attached to the back of the diaphragm, touches the magnet. When there is a sound source plugged into the speakers, the sound waves vibrate the coil of wire which bounces off the magnet field to create a loud sound.

Capacitor:

A device used to store an electric charge, consisting of one or more pairs of conductors separated by an insulator. These are very simple devices, they are just two plates of conducting material. Separated by air or by some insulating material. The top plate is positively charged and the bottom is negative they are temporary storage tanks for electrons. “Balloon of electrons” as Dr. Shields likes to call it.

Clip 1:

The basic idea behind this clip is how to create a very small silicon transistor chip.

http://www.youtube.com/watch?v=VBDoT8o4q00

Clip 2:

We skipped around in this video, but it described in detail on how to make tiny, tiny silicone pieces (thousandth of a millimeter).

Clip 3:

This clip is about the mechanics and math behind the transistors. JUst using transistors we can create logic gates.

Hello all, Hamid and Isaac here with another Blog post.

We started off class today with a demonstration on the effectiveness of of magnetic bracelets that aided in balance.
To test this Jacob went up in front of the class and was asked to stand on one leg. Dr. Shields commenced in pushing Jacob tilting him over a bit, proving his lack of balance. Next Dr. Shields did the same thing but this time he put a magnet in one of Jacob’s hands supposedly giving him more balance. This time when Jacob was pushed he remained still! Magic huh? Wrong. The first time Dr. Shields pushed Jacob, he did it AWAY from his center of balance causing Jacob to lose balance. The second time, Dr. Shields pushed Jacob towards his center of balance causing him to remain still. So it wasn’t actually the magnet causing Jacob to remain balanced, beware of this scam!

After this demonstration, we learned about the effectiveness of DC (Direct Current) and VAC (Volts Alternating Current). DC is an electric current that flows continuously in a single direction. VAC periodically reverses itself. When the voltage reverses, so does the direction of the current flow. This is the current used by the power companies because the current is able to alternate thus allowing power to be converted directly into the electrical sockets.

Here is a picture representation of the corresponding currents.

The rest of the class period was dedicated to working on final projects and conducting the lab from the previous class if you had missed it. That just about wraps class up!