Downforce - Airfoils. 1  The amount of downforce created by the wings or spoilers on a car is dependent primarily on two things... 2  The shape, including surface area, aspect ratio and cross-section of the device, and. 3  The device's orientation (or angle of attack).
Types of Seaweed. The simplest of the seaweeds are among the cyanobacteria, formerly called the blue-green algae, and green algae (division Chlorophyta), found nearest the shore in shallow waters and usually growing as threadlike filaments, irregular sheets, or branching fronds.
Seaweed is a large variety of algae that grows in both fresh and salt water. Some seaweeds are edible and can be used in plant fertilizer or medicines. It is possible to grow your own seaweed at home in a large aquarium using salt water you make on the stove.