Roboredo,+A.

I AM PBJellytime22 <3 media type="custom" key="11582620"

**DUE: 11/18/11**

**EXPERIMENT 1- Which plane design flies best?** **Hypothesis- If the designs are correctly creased and folded, then design 3 would fly the farthest.** **INDEPENDENT VARIABLE**
 * **The type of design**

**DEPENDENT VARIABLE**
 * **The length the plane has flown (until landing point)**


 * CONTROLS**
 * **the location which airplane is being thrown**
 * **person throwing airplane**
 * **the weather**
 * **angle which the plane is thrown**
 * **force used to throw plane**
 * **type of paper**
 * **measurement used**
 * EXPERIMENT 2- Which paper material flies a plane best? **
 * Hypothesis: If the same design is used for each paper material, then construction paper would fly the farthest.**
 * INDEPENDENT VARIABLE**
 * **The type of paper**


 * DEPENDENT VARIABLE**
 * **The length the plane has flown**

**EXPERIMENT 3- What time of day does the paper airplane fly farthest?**
 * CONTROLS**
 * **design of airplane**
 * **force used to release**
 * **person throwing airplane**
 * **the weather**
 * **the location which airplane is being thrown**
 * **angle which airplane is thrown**
 * **measurement used**
 * Hypothesis- If the winning design and paper material are correct, then the plane would fly the farthest at 5:00p.m. **
 * INDEPENDENT VARIABLE**
 * **The time of day**


 * INDEPENDENT VARIABLE**
 * **The length the plane has flown**


 * CONTROLS**
 * **design of plane**
 * **paper material**
 * **force used to release**
 * **person throwing airplane**
 * **location plane has been thrown**
 * **angle which plane has been thrown**
 * **measurement used**

**Research Paper!!! Due: 11/13/11** __Experiment 1 (Plane Design) __ __Introduction __ The art of paper airplanes is usually referred to aerogami because it is also an art of paper folding, like origami. Paper airplanes were originally used to model much larger scale aircrafts. Even the Wright Brothers used paper airplanes to model their airplanes. In Germany, during the Great Depression, designers used paper airplanes to measure basic performance of different plane designs. In these ways, the paper model plane remains a very important key in the change from model to a heavier-than-air flight. __Aerodynamics __ The word aerodynamics comes from two Greek words: **//aerios,//** concerning the air, and **//dynamis,//** which means force. Aerodynamics is the study of forces resulting due to the motion of air. Aerodynamics involves both the motion of the object and the reaction of the air surrounding it. Aerodynamics affects large airliners flying to new destinations, a kite flying high above the trees, a beach ball when thrown near the shore, and even a car driving to another location, since air flows around the entire car. __Air resistance __ Air resistance, or drag, is forces which apply on solid objects. An object falling throughout the layers of the atmosphere is affected by two forces. One, the gravitational force which pulls the object downward, and the drag of the object. Drag is a force that tries to slow something down and makes it harder for that object to move. Since water has more drag than air, it is harder to run with water surrounding you than running with air surrounding you. __Factors for fast airplane __ A plane has to push its way through air because air has density. It is a fluid. For a fast airplane, the plan needs to be well thought out. Planes have to provide **thrust** to move them through the resistance of air and overcome gravity. The amount of thrust in relation to the weight of the aircraft has a direct to how fast it can fly. The more thrust a plane develops, the faster it can move through the atmosphere. If you have two aircrafts of equal weight, with one plane having 30 percent more thrust, the higher thrust craft will fly faster and obtain cruising speed much quicker. The angle of any plane's wings can determine how fast or slow it can fly through the air. An airplane’s wings have varying thicknesses, sizes and shapes no two wings are exact, which affects the flight they produce. The air current over the curved surface of a plane’s wing produces a pressure drop above the wing, creating a lift. The angle of the wing as it passes through the air affects lift. The higher the angle of the plane’s wing, the slower the movement through the air. Humidity in the air changes the pressure in the atmosphere, affecting the way a plane flies. Air pressure goes decreases when the humidity increases. In high humidity conditions, the wings of an airplane have less air molecules to ride smoothly in the air. This slows the aircraft down. To overcome the loss of lift, more thrust must be added. Humid air also contains less oxygen, which affects the jet engine performance. Interfering with humid conditions will actually slow a plane's engine down.
 * __Thrust __**
 * __<span style="font-family: 'Times New Roman',serif; font-size: 12pt;">Wing profile __**
 * __<span style="font-family: 'Times New Roman',serif; font-size: 12pt;">Humidity __**

<span style="font-family: 'Times New Roman',serif; font-size: 12pt;">When the temperature of the air becomes hotter, the air density drops. When the temperature is colder, the density of the air is higher. Aircraft that take off on very hot days must increase their thrust to provide enough lift to the wing surfaces to ascend. The air on a cold day would be denser, allowing an aircraft to take off with less speed but at the same thrust setting <span style="font-family: 'Times New Roman',serif; font-size: 12pt;">All aircraft must fly through moving air currents at different altitudes, or height above sea level or ground level. These masses of flowing air can have a direct effect on the speed of an aircraft or have a slow effect. A specific mass will create high resistance as a plane passes through it. <span style="font-family: 'Times New Roman',serif; font-size: 12pt;">Airplanes have an outer layer known as the "skin." The smoother the layer, the faster the plane passes through the air. If the plane has numerous damages on the outer layer, such as bumps, scratches and loose bolts, it causes extra drag. Old bi-wing planes of WWI had non-retractable landing gear, and many wires, which slowed the planes down because of skin drag. Modern jets have sleek and smooth profiles, designed to slice through the air. Aircraft pick up several MPH (miles per hour) in speed after they have received a fresh coating of wax.
 * __<span style="font-family: 'Times New Roman',serif; font-size: 12pt;">Temperature __**
 * __<span style="font-family: 'Times New Roman',serif; font-size: 12pt;">Air motion __**
 * __<span style="font-family: 'Times New Roman',serif; font-size: 12pt;">Friction __**

=8/9/11= ==<span style="font-family: Arial,Helvetica,sans-serif;">Science to me is everything that surrounds us. Science is meant to discover what the world we live in, and to study this for whatever future may come. Science is a process that has started a long, long, long time ago and is expected to stay for many years to come. Every object we use, talk into, look at, even glance at is somehow made up of science. It started with discovering something new then progressed into studying what it can do. To find out where this new found information can be categorized with many more science. Science was to create something new, to give things that don't fit into math or world geography a subject. From past science to present science, much more advanced technology and methods are still being changed or tested out to this day. Whether the science facts or ancient past, two days ago past, or present it's science no doubt. Science is all around us from cars to lamps, to even computers. Science is to discover all the information about our natural, technical, physical world and even space to help us understand our existence. Now think about it. What is science? ==

=<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive;">I like to draw, read write and spend time learning about technology of today. My favorite subjects is math and science. My absolutely positively favorite topic in science is human body. I love how you have so many changes that go through your body everyday and all the little parts,like bones, you have in your body. My least favorite topic in science is MACHINES! I cannot stand them! I'm pretty sure even a little kindergarten class knows that if you push something down a ramp it's going to slide down, or if you pull ONE rope the other side will pull up. *GASP* I never knew that would happen! It's magic!!! Ughhh..This year I would like to learn about the clouds and atmospheres. =

<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive;">By the way my username is: PBJellytime22 <span style="color: #0000ff; font-family: 'Comic Sans MS',cursive;">I have a pet bird :) =<span style="color: #0000ff; font-family: 'Comic Sans MS',cursive;">I want to be a psychiatrist when i grow up. So that I can consult the mentally ill people and help them out :) = ━━┓━╭━━━━━╮ ━━┗┓|::::::^━━━^  ━━━┗|:::::|｡◕‿‿­­­­◕｡|  ━━━━╰O--O-O--O ╯ Nyan Kitty :3