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Soda has something in it that almost no other liquid has: lots of carbon dioxide. The carbon dioxide or CO2 is a gas that gives soda its fizz. There are a few places in the world where water absorbs CO2 by flowing over rocks and minerals with certain chemicals in them. The sodas we buy have been carbonated at the soda factory.
Carbon dioxide is made of 1 carbon and 2 oxygen atoms that form a CO2 molecule. Plants need this gas for making food and we exhale this gas. It's a heavier gas than our air and will cause a balloon to sink instead of float like a helium balloon. The soda we drink is mostly water (H2O) 2 hydrogen and 1 oxygen atoms. They add sweetner, flavoring and CO2. It's not easy to put CO2 in the water. It's forced in with a lot of pressure and sealed right away. When you open a soda you can hear the CO2 escape. They use very cold water too. Cold water holds more CO2 than warm water does. Let me know what flavors you come up with
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Air is a mixture of gases: oxygen (about 21%), nitrogen (78%),
and the inert gases argon, neon, helium, krypton and xenon (1%). Moreover, air contains small amounts of hydrogen, methane, carbon dioxide and water vapour. Has air got weight ? Yes: a cubic foot of air weighs about 1.33 oz. A room 15 ft square and 9 ft high contains about 170 lb of air. The weight of all the air on the earth is 11,000,000,000,000,000,000 lb. What is air pressure ? The force that the air exerts upon everything. By pressure we mean the force with which the air presses against one square inch of a wall. The unit of pressure is the atmosphere that is a pressure of about 14.5 lb per square inch, which means a force of 14.5 Ib on every square inch. At sea-level the average pressure is one atmosphere. Our project today tested Bernoulli's Principle. This principle states that for a fluid undergoing steady flow, the pressure is lower where the fluid is flowing faster. In this lesson, the "fluid" with which we are concerned is air. Fluids include liquids and gases and air is a mixture of gases and therefore a f The antique toy is a great demonstration of Bernoulli's Principle. Blowing through the wooden pipe, floats the ball steadily over the pipe. Experiment at home with other balls and paper shapes. You can experiment with a hairdryer too. |
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