This demonstration is based upon Archimedes’ principle, which is depicted by the following demonstration, 36.36 -- Archimedes’ principle, and which claims that a human body wholly or partially immersed in a liquid experiences one upwards force, or a buoyant force, equal to the weight of the fluid it displaces. If the immersed thing is denser 보다 the fluid, gravity exceeds the buoyant force, and also the object sinks. If the thing is less thick than the fluid, the thing floats to a level wherein the buoyant force balances gravity. The idea behind this show is that continuous Coca-Cola includes 39 g the sugar per 355 ml soda, but, since the sweetener in Diet Coke is so much sweeter 보다 sugar, there is much much less of the in the Diet Coke than there is street in continuous Coke. Diet Coke should thus be less thick than consistent Coke. The full volume of a Coke can (of either variety) is 380 cm3. If the matching volume of water weighs simply slightly much more than the can does, climate if us immerse the deserve to in the tank that water, the floats. In various other words, the mass of the can must it is in somewhat much less than (1.0 g/cm3)(380 cm3) = 380 g. The deserve to of Diet Coke shown over has a massive of about 370 g, together does a second spare can. Its as whole density is 370 g/380 cm3, or 0.97 g/cm3. This 3% distinction in thickness as contrasted to the of water is enough to permit the can to float as in the picture above.

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Each can of continuous Coke right now on hand has a massive of around 384 g. The difference that this represents with respect to the density of water – about 1.0% – is sufficient to sink the can. (Actually, if the thickness of the deserve to plus materials is the slightest bit higher than the of water, the deserve to will sink.)

If the fluid in the tank were thick enough, both cans would float. Come this end, this demonstration includes a manufacturer of salt and a big stirring rod. By adding salt come the tank, you deserve to increase the density of the water (which is currently salt water). A 1.5% (wt/wt) salt solution has a density of 1.0107 g/cm3. Because that the 15-liter tank, this would certainly be about 225 g that salt. So any salt concentration better than this should be enough to progressive the deserve to of consistent Coke. To be safe, the manufacturer contains about 275 grams the salt, which is an ext than enough to raise the most difficult Coke can listed above. To dissolve every the salt, you should stir the water quite vigorously, because that which you can use the big stirring rod.

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