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The proportions in man

Man proportions

at Scribd Publish or explore others: Illustrations proportions

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Test Scales and proportions interactvo.Proporciones

Try this little test before it's too late. Maybe you realize you have to review to improve your results.

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We talked in class scale and proportions. Here you have a video with some examples.



can write a comment with any other examples you can think of.

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Watching science fiction movies such as The Star Wars, people see it as fuel in its ships like going to the gas station to get fuel into the car. Well, no problem while we're talking about cars or planes that fly at certain speeds, but we are talking about multi-ton spacecraft moving at speeds close to or in some cases higher than the speed of light, serves to put him there kerosene as aircraft and run. Anyway, after watching the movie of Futurama I decided to calculate what would be the heat density that is called dark matter, the main fuel of the ships as the series suggests.

But as powerful is called dark matter in relation to fossil fuels that we know. For this we need to know the energy density of various fuels. Looking at our beloved wikipedia found that a gallon of gas produces 34.78 mega joules of energy, while the diesel about 38.65 megajoules per liter. If we now translate this to kilos, we find that gasoline has an energy density of 48.31 MJ / kg, while the diesel only 46.47 MG / KG. We only need to calculate the carbon, if we return to query wikipedia see there are different, we decided to stick with the more powerful it has a heat density of between 23MJ/KG and 69 MJ / Kg. Now we have material with which to compare, calculate what the energy density of dark matter.

In the series we see several times as Fry is fighting with the dark matter to drag it to the boiler. If it is a bit shocking to use a boiler similar to what our grandmothers had in their homes, but good. Back then, though Fry, it seems that dark matter has an enormous density. So we thought well that has a mass roughly about 70 kilos. Well now we only need to calculate its energy. If our dear Leela, Fry and Bender are dedicated to delivering packages between planets must travel to relativistic speeds and we consider traveling at 0.1 the speed of light, a respectable speed. So we calculate the kinetic energy of the body, so we provide the ship a mass of 22,000 kg the same about a space shuttle, so we get that has an energy of 10 ^ 19 Joules, or what is the same as 10 ^ 16 megajoules. Now if we divide the dough mass, we find that the energy density is 1.37 * 10 ^ 14, far removed from the humble 46.47 mg / kg of oil or 69 mg / kg of anthracite. So no, I hope the Hollywood writers report a bit more fuel when used in movies.