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Physics and Sports:

thought that this entry had already published some time ago, but I was wrong .. now I found when I went up the other.

Sometimes when we see a football game or a repetition of certain releases we keep the mouth open (at least to me if that ever happened to me xD). People tend to talk a lot about sports and the bus is a good place for it (a peak travel time and gives a lot of things ...) and even if you do not participate in the conversation as you learn to have them around. I came to my mind one of the conversations, and discuss how it gives the effect in some sports balls / balls.

Who has not ever released a shot with effect? Who has not tried to stop a throw threaded playing ping pong and the ball is gone for a walk?

Newton in the past and noticed the curved path of a spherical projectile that could follow a tennis ball because friction but the theory is known at present corresponds to a study by Magnus.

" The Magnus Effect could be explained as the shot in which the rotating ball creates a vortex of air around them, carrying the same direction as the flow of air which presents the ball, thus increasing the speed on that side of the ball. On the other side of the ball the vortex rotates in the opposite direction of airflow, which causes slow down due to friction, so the air pressure is lower on one side than another, causing a force perpendicular to the direction of the airflow that bypasses the area of \u200b\u200bhis career. "

therefore affects rotating bodies perpendicular to its movement through a fluid. When moving in the air is a resistance which depends on the relative velocity of the object from the air and in the case of the ball, this force is greater on one side than another.

"Wanted "

If we translate this into a movie like "Wanted" in which bullets are diverted from straight and around obstacles to reach the desired goal that is because there is a force that causes the bullet to make a rope and the force that causes this rope is a force that interacts with the bullet's flight.

Therefore, if you can deflect bullets as the Magnus effect, but one thing is divert .. and another to do the film.

leave here a trailer of the movie in case some do not know. That looks like fire and save the obstacle to reach the target of the fund.

http://www.youtube.com/watch?v=O7ftozVc3lI

also leave this web on aerodynamics in table tennis is very interesting.

Braces And Drinking Red Wine

Reductio ad doxa

If I had studied literature or, perhaps, philosophy, my dissertation would have been safely research on the aesthetic value of texts reactionary. The sheer audacity to defend indefensible positions, based on census suffrage, dictatorship, absolute monarchy, integration of church and state, inequality, or whatever-has some romantic, rebellious and even provocative. In this regard, reactionaries are often about artists.

On the other hand, my impression is that the word 'liberal' or left rarely have a sense of humor, with the honorable exception of Marx and some followers.

Take for example the following paragraph from ' Chilean church and political debate ' by Jaime Guzmán:

Our thesis is that the current pro-Marxist position of Catholicism called "progressive" or "Christian left "is the simple logical deduction of its postulates, taken by the mechanics of the facts to their ultimate consequences. The naive, and with them the idiots of all kinds and levels, have been grossly deceived, and are the only ones surprised to find plausible explanation. Things went further than they have thought and desired, but the blame for that, rather than the impenetrability of the events and their projections into the future, it is necessary to look at the sharp limitation of certain minds, who today remains only as a last resort, the goofy grin of embarrassment.

Wonderful, right?

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3. Superheroes

On the subject of superheroes I focus on two of them, Spiderman and Flash .

Who has not heard of Spiderman ... from their webs, walking through the roof and climb the walls?.

If we seek a parallel to real life, normal people can not climbing the walls and are only a few animals such as spiders and insects who may do so.

This is because the balance between the forces (the attractive force of gravity pulling down and another force of cohesion that allows be to be on the wall).
While in the case of gravity involved the mass and volume, the cohesive force influences the size of the creature ... the more increase, the greater the weight.

Humans could not do many things that makes this

superhero (and is climbing, climb, walk on the ceiling and all that with great agility) but to have his super powers, along with irregularities that have in the palms of your hands can hold and allow to adhere to many surfaces and is "feasible" climbing to reach the roofs of buildings.

Another man, though not as well known, you can do this is Mohinder (the Dr. Mohinder Suresh, Heroes Series ( http://es.wikipedia .org / wiki / H% C3% A9roes_ (serie_de_TV) ) and as Peter Parker has the agility, strength and virtually the same powers him.

Another very typical failure can be seen in Spiderman, but also with many other superheroes (Superman, ..) is stopping the free fall of people who are falling, very sharp ... causing a very rapid deceleration and would not survive.

Changing superhero powers and have a Flash , which has a superhuman speed, which sometimes even goes to run at the speed of light. This power is achieved after being hit by lightning.

The ability to travel many miles to these speeds we have to take into account many details such as friction and body temperature after running so fast, energy-consuming ...

With the speed you can reach your body would burn by friction with the air and no one knows where that heat is generated by moving so fast.
Also, how all the energy consumed recover?. As the book says "The Physics of Superheroes (Robinbook) James Kakalios, Flash would need about 30,000 miles after crossing the second energy equivalent to that would provide 50 million XXL burger!. I should be eating nonstop.

Other problems they must face, as happened to the Human Torch in the film we saw in class "Fantastic Four and Silver Surfer" , is the destruction of clothing each time it moves so fast and, above all, when he was running it would cost to maneuver because of the speed it carries. Besides any defect that would cause around.