uncleflo
Registered since September 28th, 2017
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1-7L Health Oxygen Generator Machine – EUCE
Saved by uncleflo on September 4th, 2022.
Oxygen purity is 93%±3%. Replace filter screen one key turn on electricity. Continuous oxygen supply for 48 hours. Negative ion function. Bass design quiet oxygen. Light tone intelligent oxygen making machine. Stable, continuous enjoyment at home, high-quality nursing care. Original molecular sieve, guaranteed for 10 years, fine oxygen purification treatment. Core technology, performance guarantee, using air as raw material, can separate oxygen and nitrogen in the air through pressure swing adsorption method.
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MIT OCW - 2.972 How a Hydrofoil Works
Saved by uncleflo on February 12th, 2022.
The rquirement is to lift the boat's hull outside the water. Hydrofoil (It is a foil or wing under water used to lift the boat's hull until it is totally outside the water.) Explanation: 1. At low speeds the hull (body of ship) sits in the water and the hydrofoils are totally submerged in the water. 2. As the boat's speed increases, the hydrofoils create lift. 3. At a certain speed, the lift produced by the hydrofoils equals the sum of of the boat and cargo weights. Therefore the hull comes out of the water. 4. Instead of having an increase in drag with increasing speed because the hull is lifted out of the water (contrary to what happens in traditional boats due to pressure drag), the hydrofoils provide a more efficient way of cruising. Decreasing the drag contributes to the better use of the power needed for the movement of the boat.
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