Air flow.

When you drive a car do you notice that there is a fan in the front? This is because without that fan air can successfully move around the vehicle without lifting it off the ground. As you may notice Volvo's do tend to have a higher fan this is because if someone were to fall in the road you wouldn't get caught under the car, not because of the air flow.

Turbulent:

This is somewhat of a crazy air flow, which means there is air flowing in ALL DIRECTIONS. You may notice that when you are in an airplane that it sometimes becomes bumpy, this is because the air surrounding the air craft is going in all directions.

Linear:

The air moves in one steady direction.

Cars tend to have both turbulent and linear wind patterns this means that in general the top layer of air the flies over top the car is linear and that the air flow near the bottom of the car is turbulent.

Any questions about the topics? Then consult your notes, myself, friends, or Mr. Foster. If you are still confused refer to the Internet.

Class- January 6th 2010

Hey everyone,
Today we talked about many things including particles, your science presentations which were due on the 18th, and fluids.

Starting with the science presentations, they will not be counted late until friday so please hand it in. Remember every day after the due date will have 10% taken off of it.

Particles! Today we talked about the particle theory which is below:

1. Matter is made up of tiny particles.
2.These particles are constantly moving.
3.Particles and Matter are held together by a very strong electric force.
4.There are empty spaces between the particles and matter that are very large when compared to the particles themselves.
5.Each substance has unique particles that are different from other particles and substances.
6.Temperature effects the speed of particles. The higher the temperature the higher the speed of the particles.

Remember all pure substances are homogenous.
Imagine a labradoodle (Labrador, and Poodle) this breed of dog would technically speaking be heterogeneous because the animal is made up of two different substances, whereas a purebred golden retriever is homogenous because it is made up of the same substances.

Ok, gold for example is a pure substance because it is built up of the same particles.
Gold in the periodic table is AU, it is easier for most people to remember Amazingly Unique, because those two words might help you remember the term AU, and gold is unique.

The Presentation

Hello FI8D!
Get your power point presentations done very soon.
Using the power point tool you will be able to create a presentation of about ten slides to get your audience more knowledgeable about your topic.
Many topics are: Is our society a consumer based society? Do we throw out too many items?
Get more informed and try to do as much work in class as possible. Please note that by only showing a slide you in fact are boring your audience. For further questions about this topic, please refer to Mr.Foster or fellow classmates.

The Great Debate!

There is a debate on Thursday SO BE PREPARED.


What do you need to do?:
Question people, ask questions similar to what they have purchased or why they have purchased an item. Did they replace it? You might want to even ask if job's make people bias, or maybe the community is a consumer based community. Get to the point ask questions about why they purchase everything! Good luck if you have any further questions refer to me at school or Mr. Foster, if you still have trouble read over the sheet and then if you STILL have trouble ask a friend or parent.

Systems, and a project.

Systems, and an individual project.

Remember everyone if you are having trouble understnading what I am saying please refer to my previous post if you STILL have trouble go to Mr.Foster early or after school, and everything will be dandy.

Ok so firstly here are some notes you need to remember.

-Undersired outputs are called side effects.
-All systems evolve when humans are impacting the system.
-An example of this is global warming.
-Human input may change the outputs and/or side effects

Good Effects that we do:

-Energy use reduction
- Hybrid Cars
- Sierra Club/ and WWF

Bad Effects:

-Water overus
-food waste
-cars and pollution
-Habitat destruction

These and good effect affect something called Global Climate Change.

Individual Project:
For those who missed the class you will be given a page with information on the porject which involves surveying people you know unless you really want to survey people you aren't familliar with, and so get the page tomorrow morning if you missed the class.

Systems: Open? or Closed?

What is a system? A system is a group of mechanisms that is used to do a function (lifting someting off the ground, or pulling snow off the ground, etc.In the world of systems we have learned about two. These are called open and closed. An open system means that at the end of the system there is a opening where a liquid, fluid or substance... pretty much anything, will eventually come out. Examples of this are: A car, because the exhaust comes out the back, the digestive system...if you know what I mean. Whatever comes in must come out, these systems never let the materials inside of them circulate.

Closed System:

This system has no start or stop button. These systems usually run in a circular motion allowing nothing to escape. An example of this is your body's ciculation. Heart pumps oxygen into cells, cells come back to get more oxygen, it is a continuous cycle.

Feedback:
The problem with any system is that without feedback you cannot know whether or not everything is going well. If you are at one end of a conveyor belt you can't see what's coming off of the other side, so it is wise to get FEEDBACK! You're brain is constantly getting feedback from the rest of your body.

The Five Simple Machines You Need To Know.

Hello FI8D!

In this blog I will be talking to you about two different simple machines.

(FOR LEVERS REFER TO A BLOG POSTED 2 WEEKS AGO)

The Wedge:

The wedge is similar to an inclined plane but is of course different. A wedge is usually used to keep something in place or separate two different objects. A door stopper is a wedge because it keeps a door from moving.
How do you find the MA of a wedge? divide the slopes length by its length at the end that is thickest.

The Pulley:
Do you remember when you were little, and maybe had a tree house? Well for me I would take a rope, attach something like a sandwich to the end of it and pull it up into my tree house, but a pulley is slightly different because instead of pulling the rope yourself you have to install a fixed pulley which is a way of saying a circle with a piece of metal that is attached.

If you are having trouble visualizing GOOGLE: FIXED PULLEY and it will be very easy to find on google images.