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Created with Fabric.js 1.4.5 How does wind make a sail boat move What is wind Wind is moving air that is caused by differences in air pressure within our atmosphere. Air is an invisible gas which is a mixture of oxygen (21%) and nitrogen (78%) but can also contain argon, carbon dioxideand 3% of water vapor particles. What are sails How does the wind and sails make a boat move forward The sails on a sailing boat are dense and the wind cannot pass through them. When the wind (a gas) hits the sail (a soild) , the wind pushes the sail in the direction it is blowing.The mast and ropes connect the sail to the boat and the wind hitting the sail pushes the boat forward. Pulling the sail in or letting it out and adjusting the sails shape controls the amount of wind hitting the sail and this helps the boat sail at different angles to the wind. Sails are pieces of cloth that are held by a boats mast. In the olden days, sails were made of flax,or cotton but now they are made from synthetic fibers such as nylon or carbon fiber. Flax (41% fat, 20% protein, 28% total dietary fibre, 7.7% moisture and 3.4% ash) and cotton (cellulose 91.00% water 7.85% protoplasm, pectins 0.55%) are natural plant fibers and synthetic fibers such as nylon (condensation copolymers formedby reacting equal parts of a diamine and a dicarboxylic acid)or carbon fiber (carbon atoms are bonded together into fibers and combined with plastic resin) are elastic synthetic polymers. By Ruby McMaster
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