08/31 Buck

No assignments were turned in today, but she checked that book problems assigned yesterday.  We found out we can do an extra credit experiment.  Attach two small boats to either side of a tub of water using string and run a current of water between them.  The boats should come together because of Bernoulli’s Principle.  Take a picture of yourself doing the experiment with small children (they have to be younger, they can’t just be stupider). This is due September 30. Our homework is the What is a Radian? Lab on page 5 of our manuals.

We took some riveting notes on Bernoulli’s Principle:

·         When the speed of a fluid increases, pressure in the fluid decreases due to conservation of energy.

·         On an airplane, the top of the wing is longer than the bottom so the air on top has to travel farther, thus faster.  This causes lower pressure above the wing and gives the wing lift

·         Other examples:

o   In a sealed house, a roof would blow off during a tornado (oh no!).

o   A shower curtain that sticks to your leg when you turn the water on (ewwy).

o   An umbrella flips up because of the area of still air under it (*insert a joke I didn’t get about some dude*)

·         Why does this happen? The air molecules that are moving faster are less spread out, thus they have less pressure.  I think of it like a herd of people going somewhere.  If you’re all sprinting, you probably have to be more spread out in order to avoid tripping.  But if you’re walking slowly down Mains Street, you can get a lot closer to people… sometimes uncomfortably close.

After we took notes, we realized it was raining.  Anyways, we did an experiment demonstrating Bernoulli’s principle.  We tilted our heads back, and blew; trying to get M&M’s to hover above our lips.  Clay was the only one who was able to do this well #winning.

Then we finished our kites and took them outside. But it was raining, so most of the kites hit the ground and ripped after the paper got wet.  One group’s kite worked really well though.  It was Clay’s group. (He was on fire today!) We came back into the class room until the bell rang.

On a side note: today we established that no one is allowed to die in physics.

QOD:

To my best understanding, the kite blocks the wind causing the air on the far side of the kite to move slower and have a lower pressure. This allows the kite to fly.  The faster air on the near side causes lift.

8/31 qod

How does Bernoulli's principle apply to the flight of your kite?

 

coatshaan

8/30 Bloomberg

Today in Honors Physics 3rd period we turned in our book treasure hunt worksheet. After that we took a classroom procedures quiz. Following the quiz Mrs. Coats- Haan checked to see if we had book covers on our textbooks. Later Mrs. Coats- Haan demonstrated Bernoulli's Principle with a toy crocodile that had floating eyes when blow into. Next Hunter Miller also demonstrated Bernoulli's Principle by blowing air into a long plastic bag with holes at each end, in attempt to make air come out the other end. This demonstrated Bernoulli's principle because Hunter blew into the bag the correct way and was able to put not only his own air into the bag but also the air around the opening because the lower pressure of his fast moving air caused the outside air to follow. Afterward the entire class was given plastic bags and, like Hunter, attempted to make air come out the other side. Then Mrs. Coats- Haan went over instructions for making a kite, which we proceeded to work on with the other people at our table. The process in which the groups designed the kite required math skills, and patience so as to not make the kite lopsided. Most if not all tables did not finish the kite and will continue to work on it tomorrow and hopefully fly it if the weather and time permits.

QOD: Give an example of Bernoulli's Principle in action.
Example: An airplane wing is made so that the top is curved and the bottom is flat. The air traveling on the top of the wing travels faster than the air underneath. The faster air has a lower pressure, so the higher pressure on the bottom of the wing causes the plane to go up. When the plane goes fast enough this lift is more powerful that the downward gravitational force..

8/30 qod

Give an example of Bernoulli's principle in action.

 

-- ch

8/29 Alaimo

In Physics today, Mrs. Coats-Haan checked to make sure our Lab Manuals were in our binders.  After checking the binders, we were placed in our assigned seats as Mrs. Coats-Haan handed out the textbooks and told us our scores on the pre-test.  While handing out the books, we divided a poster board amongst our tables and decorated it with items that we enjoy.   After we finished decorating our individual sections, we proceeded by finding interests everyone in our table had in common and shared our poster with the class.  After sharing the posters, we hung them in the ceiling tiles and were each handed strips of paper.  We blew on the paper to display Bernoulli’s Principle which says as the velocity of a fluid increases, the pressure put forth by that fluid decreases.  At the end, we were given a book treasure hunt worksheet to complete for homework in our textbooks for tomorrow.  Tomorrow we will also have a quiz over the procedures and our books must have a book cover.

8/29 Welcome and QOD

Welcome to the 3rd period Honors Physics blog!  This is where you can find out about all the things that happened in class.

 

Today's question of the day is:  What is Bernoulli's Principle?

 

-ch