Hull Fundamental Of Futures Manual

True

The story has already been told, retold and retold a thousand times. Everyone knows that once a certain German city was plagued by mice. It goes without saying that the mayor offered a reward to get rid of them, or that passes near a river Hamelin which derat the problem. At the end of the day, it is known that mammals do not have gills and it was expected that any mouse will complicate the issue of breathing underwater. Fortunately, no one remembers what is the subject of magic and the flute is pure fiction. Well, actually "Almost" no, because the mice had indeed always present the other side of the story, but we've taken good care not to disclose and to prevent humans from falling into the account of his forgetfulness.

.

usually ignored the Pied Piper of Hamelin was known long before thousands of members of our species appeared in the city. In fact, never knew playing the flute or any musical instrument: a barely managed to whistle three notes in tune, which only happened when I was very nervous or too angry. Just was only doing what he did best: kneading and baking flutes. If he had also been an expert in manufacturing felipes, Miñones fat or fine breads, the story probably would have been different. But luckily in Hamelin had a single baker, and the young man had a very limited ability. As the rodents we love the crumbs, the mice of the city used to spend hours hunting through the flute business. And as the boy not much liked the idea of \u200b\u200bsharing their pipes with them, the bakery was filled with rat poison granulites attractive, agile cats and tricky traps scented gruyere cheese. Poison and trappers had always been successful. Cats not so much because they slept a lot and at the slightest neglect, eat up occasional croissant. But things got serious when he came the plague of mice.

.
Although in truth it was not exactly a plague, but rather the massive attendance of relatives and friends to the wedding of the mouse with the mouse González García, rooted both in Hamelin for some years. There was no size rodent that would miss the event. The festivities are spread over a month and the patience of citizens at the same time exhausted food reserves. It is true that the mayor offered a reward for a solution, but it is false that the piper is proposed to get rid of mice. The event itself was more luck than strategy. With the bakery impassable rodenticide trappers and empty bottles, tired of new visitors devour even the bags of flour kept in the tank, flutist decided that enough was enough. She wanted to scream with indignation, but could only articulate the usual three notes, with such bad luck for our species, that when they are released hit him with the elbow at a bottle on the table and the contents scattered over the body of mice present. Yes, it was exactly what was inside the container. As no human being should know and all rodent knows well, is quite harmful to us. We barely grazes suffered a terrible allergy start to sneeze in the middle of an unbearable itching and it is impossible to avoid immediate infection. Evil expands in seconds, and can only calm water. That is the reason that all the mice ended up in the river Hamelin. But it is true that they have drowned. Cured of the itch and before the wedding festivities interrupted, simply swam to the other side and returned to their homes.

.
However, in Hamelin word spread that the decision had left the bakery. And over time people began to forget that the piper musical ear was less than the cat after the episode Herminio the wall. Humans love myth, and it seems that the Greeks had one about Orpheus, a musician can be followed up by rocks and trees with his talent. Obviously, not long to mix the two stories. And humans also love stories that are appropriate and allow their children to learn good things, almost immediately loved the bad example of the mayor retracted his promise.

.

For us, it goes without saying that the misunderstanding of the flute came to us barbaric, because the adults and children focus on the moral, will ignore the contents of those bottles-nothing magical and never absent in any kitchen can annihilate.

Programmable Thermostat Skipped Monday

Piper January 21st, 1926

to Virginia Woolf, January 21, 1926
Milan [sent in Trieste]

.
.
I'm reduced to being a thing you want to Virginia. I mentally composed a beautiful letter in the hours of insomnia and nightmares of the night, but I was all: just miss you, in a rather simple and hopelessly human. You, with all your eloquent letters ever had written a sentence as simple as that, maybe even not the have imagined. And yet I think you would allow a small margin sensitivity. But the dress with so exquisite a phrase that would become a little less real. In my case, however, is quite bare: I miss you even more than they had thought, and that it was prepared to miss a lot. So this letter is really just a cry of pain. It's amazing how you got to be essential for me. I guess you're used to having people tell you these things. Damn spoiled. I will not make me want more leaving me to you this way. Ah, love, I can be witty and distant with you, I love you too. Too authentically. You do not have any idea how I can be aloof with people who do not want. The have become a fine art. But you destroyed my defenses. And actually I'm not complaining.
.
But equally, and will not bore you more.
.
We started back and the train are vibrating again. I have to write to the stops, which thankfully are few along the Lombard plain.
.
Venice. The stations were great, but I did not realize that maybe the Orient Express not stop there. And here in Venice we were nothing more than ten minutes a little bit miserable to try and write. I have not even time to buy a stamp Italian, so I'll have to send it from Trieste.
.
Swiss waterfalls were frozen and they seemed solid and bright curtains of ice suspended above the rock. So beautiful ... Italy is covered with snow.
. Let
reboot. I'll have to wait until tomorrow morning at Trieste. Forgive me for having written a letter so short.
.
Vita Sackville-West

(free version in English by Gabriela Brown)
.
.

to Virginia Woolf, January 21, 1926
Milan [posted in Trieste]

.
.
I am reduced to a thing that wants Virginia. I composed a beautiful letter to you in the sleepless nightmare hours of the night, and it has all gone: I just miss you, in a quite simple desperate human way. You, with all your un-dumb letters, would never write so elementary a phrase as that; perhaps you wouldn't even feel it. And yet I believe you'll be sensible of a little gap. But you'd clothe it in so exquisite a phrase that it would lose a little of its reality. Whereas with me it is quite stark: I miss you even more than I could have believed; and I was prepared to miss you a good deal. So this letter is just really a squeal of pain. It is incredible how essential to me you have become. I suppose you are accustomed to people saying these things. Damn you, spoilt creature; I shan't make you love me any the more by giving myself away like this --But oh my dear, I can't be clever and stand-offish with you: I love you too much for that. Too truly. You have no idea how stand-offish I can be with people I don't love. I have brought it to a fine art. But you have broken down my defences. And I don't really resent it.
.
However I won't bore you with any more.
.
We have re-started, and the train is shaky again. I shall have to write at the stations –which are fortunately many across the Lombard plain.
.
Venice. The stations were many, but I didn't bargain for the Orient Express not stopping at them. And here we are at Venice for ten minutes only, –a wretched time in which to try and write. No time to buy an Italian stamp even, so this will have to go from Trieste.
.
The waterfalls in Switzerland were frozen into solid iridescent curtains of ice, hanging over the rock; so lovely. And Italy all blanketed in snow.
.
We're going to start again. I shall have to wait till Trieste tomorrow morning. Please forgive me for writing such a miserable letter.
.
Vita Sackville-West.
.

Experiment With Bromothymol

Zonzo, Bonzo and the Dragon

Hace muchísimos años –pongámosle unos cuantos miles, año más, years less-a nest egg rolled, slid down the steep slope of the mountain, dodged a couple of bushes, bounced off a ledge and ended up forgotten, almost forever, in a murky and hidden crack in the hillside. Murky enough so that the sun's heat could not help incubate and hidden enough so that nobody could ever find. So there it was the egg, hidden in the dark in a hole on the side of the mountain, as I said, almost forever. Because as you have guessed, if the egg still continue there, this story probably would end soon. After all, an egg hidden in a crack can not pass anything interesting.

So was that a few thousand years later, precisely on Saturday around noon, just in a storm, the hole where it was the egg began to flood. And much rain got inside, the egg began to float. First just a little, then a little more and then began to move about water seeping through the crack and floated to get stuck on a rock, half concealed in a pasture. Yes, what is said camaraderie, was camaraderie. After so many thousands of years the water had been good, because I was pretty filthy. But for when the storm subsided and the sun rises, the shining egg that was a pleasure, almost like a rainbow, but well-violet.

As you suspect, this egg from which I speak is not much like the one would keep in the refrigerator. As the violet, basically. In short, abbreviated. The storm had cleared completely and the heat of the sun was hitting half strong, when Zonzo just went out there, I was looking for somewhere with a small shadow to lie down for a nap and suddenly saw something shining semi oval next to a stone, half concealed in a pasture.

Zonzo was not what one would call a dog with many lights, it was rather pretty goofy, but not enough to not realize that this kind of violet rugby ball must be something else. So she was snuggling softly, just in case, sniffing it deep to try to guess what it was. And when Zonzo Justito Justito had already committed a bit and had his nose practically glued to the base, the rugby ball made violet crack and zaz! ... cracked. The shock, Zonzo started barking. And explained that it was half eejit. He barked and barked and barked and barked and barked even a little more. Both barked, the egg-ball-of-rugby-violet end of break. And when Zonzo
saw what was inside ...
And when you saw was inside Zonzo ...
Well, better not to think about, or the blaze that took off what was inside the egg, or how Zonzo barked when he singed whiskers.
- Ahhhhh! Zonzo cried. - I burn, I burn!
- Ahhhhh! Shouted what was inside the egg. - Bite me, bite me! After
uncomfortable silence ensued, during which they both looked very closely in the eye without making the slightest movement.
"What a strange lizard" thought Zonzo.
"What egg plus hairy and noisy ", thought the lizard
Zonzo barked again, and so that the lizard (which it does not look much like a lizard) will be clear who was boss. Then she came out of the shell and spit a little fire between his legs, so that the egg-weird-loud-and-hairy Zonzo I mean, it became clear he was not going to leave so easily frightened.
-Che, terminal fire Zonzo said, putting his feet in a puddle that had formed with the rain a while ago.
"Okay," said the lizard. "But shut up, because I bristle scales tail fuss.
- Scales? Zonzo asked.
- What do you want to have? Pens? The dragons have scales.
- Dragons? Zonzo asked amazed.
- Why do you repeat everything I say? "You're goofy, you? "Said the dragon a bit annoying. "Yes,"
Zonzo. "I'm Zonzo. How did you know? "We knew us from somewhere else?
I do not think. I just left inside the egg, do not you remember? And you are? Because to be an egg you have too much hair. Also do not see you're scaling and very noisy.
"I'm not an egg I'm a dog, "explained Zonzo half offended.
-Ah. Why are you doing so much noise? Asked the dragon.
"It is called" make noise ", is called bark. Ladro because all the dogs barked, "said Zonzo and definitely annoyed by the ignorance of the dragon.
- And why they bark? "She insisted. Why not if they know that dragons are never conform if one does not answer your questions.
-Ufa. I do not know. We bark period. Now, if you do not mind, I'm going to take a nap under that tree, that's why I came not to talk to lizards chatterbox-ay! I singed legs again! -Is Zonzo complained.
"Excuse me, gave me a dragon coughing, laughing lied to in while Zonzo grumbled away to the shade of pine to see if once and could get some sleep.
"Okay, I let you sleep. But first explain to me how to get to the castle from here, "she said.
- Castillo? Here there is no castle Zonzo yawned as he gave the fifth round in the same place before bedtime.
"Then direct me where to live, 'said the dragon princess. "Nor have
princesses," he said, supporting the base of the muzzle on the legs straight.
I do not understand. And what do the dragons living in this place? She asked, puzzled.
And, as you have noticed, for when the dragon in this story was born, was no longer time of dragons. Abounded, of course, other kinds of animals. Some with scales, others with wings, many with claws, many with very sharp teeth, but definitely no, as it met all these features together. Not to mention the ability to breathe fire from his mouth and smoke through the nose, which were, undoubtedly, unique skills of our Dragling. "Look," said
Zonzo. "To my knowledge there has never been dragons here. At least I never saw none. I did see many lizards in the mountains, you sure you're not a lizard?
"Better that I am not a lizard, eejit. I am a terrible and dangerous dragon, do not you see? But now I do not know what I do, because dragons work defending the princesses who live in castles. And here there is no castle or princess.
"Now I remember, the day of spring we had a princess, but was not from here, was of Bahia Blanca. Maybe there is a castle. Why do not you go and leave me sleep easy step, "suggested the dog.
- Is not me? " "Said the dragon getting pretty voice.
"It's hot," protested Zonzo.
-Dale, porfis "she insisted.
"I was going to take a nap," growled the dog.
"Please," said the dragon and making eyes blinking. "Is it far-
Zonzo argued in a last attempt. But when the dragon sighed, deeply distressed, the poor are resigned "Well, come on, is fine. I'll walk.
"The truth is that to believe a terrible and dangerous dragon, this lizard is very annoying," she thought as she stretches Zonzo and began to walk toward the station.

* * *

-The train passes a while now. Here you go up and do not you get off at the station until General Roca. From there are about two blocks to school ... Are you listening? Asked the dog.
-Ehh ... You told me how's your brother? He hesitated a dragon.
"Bonzo" said Zonzo for the fifth time.
- And Bonzo will be able to tell me how to get to the castle where the Princess? She insisted again.
I do not know. But if Bonzo does not know, nobody knows. It is a very intelligent dog my brother. It is the only family that goes to school. There he learned many important things, so must have learned something about dragons Zonzo said, he was very proud of Bonzo.
- Why do not you take the train and escorted me to Bahia? I have fear of losing, "said the dragon.
"No, no, yes-no Zonzo is interrupted. "And you can not miss miss, is straight from the station, there is no way of getting lost.
-Dale, come with me and the way you see Bonzo "she insisted.
Zonzo The truth is that I had really wanted to go to Bahia Blanca, but the idea of \u200b\u200bseeing his brother disliked, because she missed him a lot. So, without much thought for not repent, he boarded the train, gliding up a good nap.

* * *

- Are we there yet? Asked the dragon.
-two minutes less than two minutes ago when you asked me the same thing for the hundredth time, "said Zonzo mufado.
And the dragon it was quite rotten, because I had been wondering "how much longer?" And "Are We There Yet?" Even before boarding the train. So when the car finally stopped at the station, the poor dog, who was unable to sleep or nap thirty seconds, sighed with relief.
-Dale, we will look for your brother. I can not wait to get to the castle, the dragon was excited getting on the back of Zonzo and spurring like it's a horse.
"With how calm I was there in Sierra. Bonzo had better give me a leg to get me off this lizard "thought Zonzo.
Between us, luckily Zonzo addition was half good-natured goofy, because in fact the dragon was not too terrible or too big to say, and if he had wished it could habérsela eaten in one bite.

* * *

When they reached the school gate, the two noticed the little big problem had to solve.
- now what do we do? Asked the dragon. - Are you sure your brother is in here? And just when Zonzo
would answer the door opened and a woman in blue overalls were told to pass.
"Strange," said the teacher. "I could have sworn I saw you recently in the courtyard, Bonzo. When you left you?
But after let them shut the door and walked down the hall to the classroom where students were waiting, without much concern for Bonzo, ie, Zonzo.
-Ufs, I almost see, "said the dragon, which had been hidden under Zonzo ear. "Not that I'm afraid," he explained. "But it would have been terrible to have to attack when she screamed telling everyone that there is a dragon inside the school.
"Sure, sure," said Zonzo, actually a lot did not believe him, because he felt shaking all the time under your ear. "Now we have to find Bonzo. Where is he?
The dragon made a face of "this dog can not be more goofy"
- Did not you hear the teacher said she saw you on the playground? He asked.
- Who? Me? But if I was out with you ... Zonzo replied.
"No, goofy, Bonzo. She mistook you Bonzo, did not you see? She said she had been sleeping on the patio. That's where it should be your brother in the backyard. Come on, come on.
Just then the bell rang for recess and a din of kids started running and screaming out orderly and quiet of the classroom.
the shock, the dragon turned to hide behind the ear Zonzo.

* * *

After recess, in different places of the school had held talks of curious. Alcira

"Miss," said a girl. -A Bonzo came under fire one ear.

- Did you see, Martin? "I said Agnes to the other goalie. "Bonzo came to ask for food again. With everything that I had not eaten today to request more till tomorrow.

-Leticia, we will have to do something with Bonzo, it might not install all the time on the stairs of the hall bath to ask the kids cookies, "said Isabel.
"But if I saw a while ago and was sleeping peacefully next to the stage," replied the deputy.

- ister, ma'am! Bonzo has a green tick!
-Ticks are not green, Thomas. "This
yes, and also has wings. "It would be a fly
, Thomas. "But seño
... Thomas
"Stop, sit in your place and stop inventing nonsense.

* * *

Meanwhile, two dogs and the dragon talked to solcito Zonzo in the courtyard and he explained to his brother who needed his help to find a princess and a castle.
stared Bonzo the first one and then another, until finally he said: "It will not be able to be. Here we do not have castles, least of all princesses.
- What about the spring festival? Zonzo asked. "That was a
Bay girl here, but not a real princess. Princesses and castles as you need this dragon is only in fairy tales, not in real life.
The dragon, which she did not feel so bad and so dangerous, but a little sad, began to runny.
"Well, no big deal. Do not get wrong, "said Bonzo a bit shaken. "I think I know someone who can help. Miss Paula knows a lot of stories, capable in the library where she works, we can find a story that can get you. I do not go much out there because Paula does not have cookies, as the kids first and second, that are bringing more and more goodies they invite, but we can go to look if we find something that works in the library.
So there you were. And Bonzo was right, there were cookies, but books ... ufs ... had books of every color.
- And in what I get? Asked the dragon.
"Right," said Zonzo (which although it did not read the understanding) and opened a book either in a random page, so bad luck, the dragon landed right in the story of The Three Little Pigs. And if anything characterizes the dragons is that they are enthusiastic and well led and they alone, she was just there to blow on par with the wolf, forgetting that in addition to smoke from his mouth came fire.
- I burn, I burn! Shouted one of the pigs with their tails scorched as the flames were spreading from the house of straw to the wood. And if it was not practical because the pig he managed to shuffle the emergency fire extinguishers, burn all the books and with the whole school. Say that Bonzo
also reacted quickly and opened the book for the dragon could hop out before the wolf and the three little pigs, which had the face of very few friends, achieve it.
"In this tale does not fit very well," said the dragon all stirred by the fight. "I'd better get into this one.
And before I could Bonzo tell him that no, that there either, the dragon had already jumped in a book that covers Razul said Red Riding Hood.
- Again? "Said the wolf pretty upset when he saw her. "Look, as far as I know this story does not see any dragon ... And after the disaster that you've started recently in the story of The Three Little Pigs, sure do not need any. In addition, at any time is Little Red Riding Hood. I already have to be hidden behind the tree to surprise her. I do not want to linger, because if it fails as before, I had to go to the bathroom in a hurry and the narrator bored everyone describing the landscape for five minutes to pass the time until I ...
-understand ... "said the dragon resigned and weeping as he walked away.
But then the wolf, which basically was not so bad, felt a little guilty for having mistreated, sighed deeply, and while the trunk is camouflaged behind shouted, "Look, I'm no expert on dragon, let alone ... But it strikes me that you could try your luck with Flori, Ataúlfo and the Dragon. Imagine, is on the bottom shelf.
- Thanks! He smiled a little more animated the dragon and jumped out of the book just as Little Red Riding Hood was approaching the basket. I was going to warn
that the book also served, but did not give me the time-challenged Bonzo.
- What about your brother? Asked the dragon.
-is standing guard at the door, if he returns, "said Bonzo Paula.
-Wolf recommended that I try with a story that is on the bottom shelf, "she explained.
-Mmm ... The Princess, the Knight and the Dragon. Is this? Bonzo asked while poking with his nose between the spines of the books.
"The truth is that I forgot. But it sounds like, and speaks of a dragon, which serves the same insurance. Bonzo
opened the book and when the dragon is put in just went to stop in the middle of a scene in which the knight faced the fierce dragon to free the princess from the tower. The three characters stood still watching her.
- Agh! Yuck! A lizard! "Said the princess.
"No fear or worry my love," said the gentleman. "The crush with my shoe.
"I'm not a lizard," protested the dragon. "I'm a terrible and dangerous dragon, do not you see?
From time to laugh, almost fierce dragon story grabs an attack of hiccups. The princess burst into laughter and the knight is tempted as he dropped the sword.
- But if you measure less than six inches! "Said the dragon. "He's right princess, you're a lizard.
Outraged, the dragon spat a good breath of fire.
"Well, okay, in any case will be a fire-breathing lizard, but terrible and dangerous, you do not have anything," Knight said recovering a little fit of laughter. "I could crush you with your shoe, would require even use the sword.
The Dragon, hurt, left the story hitting a bang (or a tapazo, which for that matter) and sat on one of the tables in the library. His face was all red in anger.
- Have not worked? Asked Bonzo.
"Neither," she said.
"Maybe this was not the wolf that ventured said Bonzo.
Zonzo Just then barked to alert someone coming to the library. Bonzo and the dragon is hiding behind a cupboard. Miss Paula had in hand a big and very heavy book. He left on the desk and went out again, making a mime Bonzo, who was actually Zonzo in the head.
"Strange you here, Bonzo," said Paula. "Stay if you want, now I return.
just came out, the dragon and the two dogs came to the desktop. And seeing the picture of the cover of the book to three came up with the same idea.
"This is definitely your story Zonzo said that although he could not read could see from the drawings that the dragon Justito wore in the book.
- you dare to get in there? Zonzo asked.
"Better," said the dragon. And without hesitation he said goodbye to the dogs and plunged into the story to come out ever since.

* * *

When he entered the library, Paula was not surprised that Bonzo was no longer inside. In fact, he thought it was strange that had happened there, because it almost never did. Then he sat
on the desk, opened the heavy book he had brought Shrek a while before and started looking for a good image to work with kids in fifth, who had seen the film last week.

Replacement For Bare Minerals

Concepts of Physics - The Karate blow

I leave a small pearl that I began to analyze with the help of my friend Sensei M. Fabian King (3rd Dan Karate) who always contributed to the progress of my knowledge.

1 - Introduction
In recent years, the ancient Oriental art of karate do (the word literally translated means "the way of the empty hand") has become very popular in the Western world.
The Karateka shows the result part of your workout by breaking wooden boards, cement blocks and other objects. We talked a lot about the history and culture of the martial arts, but this time we will study a little physics, we will study the mechanics of the collision of a hand against a solid object.

2 - Concept of Force, Moment and Strain Energy.
In the case of a crash, is well known that a large object moving at high speed, hit harder than a small object moving slower. In an attempt to break a table, the karateka will look to its heaviest blow, this implies that seek to ensure that your hand reaches the highest speed possible ... now what does it mean to strike harder? ... In terms of physics, we can analyze it in two ways, from the concept of force and moment and from the concept of strain energy.
Force (F) is mass (m) times acceleration (a): F = ma
Time (p) is mass times velocity (v): p = mv
acceleration measures change speed in time, ie acceleration is the derivative of velocity with respect to time, therefore, if we replace a by dv / dt and apply resulting in p / dv, we see that F = dp / dt, then we say that F.dt = dp, ie Ft = I (Pulse, or the variation of the moment).
say that the impulse is an amount "preserved" is not created nor destroyed, but in the present case, is transferred from one object to another (along the solid object it hits.) This follows from Newton's third law or principle of action and reaction (For every force acting on a body, it performs a force equal but opposite to the body that produced it). Thus, the second object (beaten) is exactly the same moment that the first object loses.

Assuming that, I is constant, is transferred from hand to object beaten, then F t are inversely proportional. So we I convey the same by applying a strong force in a very small range of time or by applying a small force over a large interval of time.
The next question is ... why then is it necessary to speed the blow? For if the hand moves faster, in theory, when it hits the object, and complying with the principle of action and reaction, slow down fast too, which means that the time interval in which transfer their momentum to the object will be very short, therefore, the force becomes larger. Big
This transfer of force causes a relative acceleration of the hit of the object relative to other parts of the object. Ie the small area struck by the knuckles or the edge of the hand tend to shoot out to beat the same direction as the rest of the board receives no pulse and are also supported by some kind of "fixed." So it is breaking.

analyze this from the concept of strain energy.
As an object of mass m1 (in order to hit), at rest, and another object with mass m2 (the karateka's hand) moving at velocity v at the time of impact, if we ignore the peeling thermal energy in motion, the amount of strain energy would be:

ΔE = ((1-e ^ 2)) / 2. (m1.m2) / ((m1 + m2)). v ^ 2

where e is the coefficient of restitution, which measures how elastic the shock. Is a function of the hardness of objects, and which together with the speed, determine the pulse. If two objects collide perfectly inelastic, e = 0, the transfer of force between the two is immediate (short time). If perfectly soft objects colliding (and approximately 1), the energy transferred will tend to 0, or rather, the time interval during which transfers the force becomes larger.
An easier to understand this would be the following, we compare the time of contact and transfer of force from a blow applied to a pillow the edge of the hand and a blow applied to a brick with the knuckles.
As ΔE is proportional to the square of the speed, the faster you move your hand, the more energy transferred to the object hit. Again the end of this story is breaking the object.

3 - The area hit.
Anyone who is beaten by hand an object using a wrong technique can attest to the pain it causes. The hand is a complex system of bones connected by tissue, and much could be said about the importance of proper alignment of the hand to strike. From the point of view of physics, the important thing at the time of impact is that all the above in terms of force, momentum, momentum and energy, presupposes a certain unit area.
Reducing the impact surface, the karateka apply all that energy into a small point, ie, the object must be beaten "resist" or suffer a huge amount of energy in a very small point.
practical example: Consider a person capable of applying a shock equivalent to 190 joules (J) of energy. A normal hand is about 15cm long by 10 wide, ie 150 cm2, or about 1.3 J per cm2. Karateka
If only hit the side of the hand (5cm by 3cm), apply about 13 J per cm 2 ... 10 times more energy!! Hence the search karateka Always apply the strokes using small areas of your body as a point of contact (knuckles, elbows, etc).

4-Focus
Many times, when he advises a novice how to break a table, you are instructed not to seek to break the table, but look floor breaking wave wall behind her. This is to ensure that the hand is not slowing down at the moment of impact, a mistake that many beginners make for fear of hurting or uncertainty. Said that it is very important to achieve the highest possible speed at the time of impact, and there are several video documents showing that the speed is achieved when the arm is extended by 75%. This is logical if we think the other 25% of the route will be used to stop the hand. It goes without saying that the point of impact is at the time you get to 75% of travel.
This means that to achieve a successful break, we should focus on a target located 25% of the total length of our arm, behind the object to hit. That should be our mind and ki to strike.

5 - Using the body weight
see that the mass m is an important factor in the formula of Time, Power and Energy. In all cases, the proportionality is direct.
As the mass of a karateka will be the same before and after a stroke, many times, it disregards the mass in these equations, however, is very important how that mass is used at the time of the coup, much of that mass is involved at the time of hitting. That is, we can not control 100% of your weight and manage to strike at will, but we can control a certain percentage of our weight and apply at the point of impact.
For this reason it is crucial not only to use the arm or leg to hit the whole body should be aligned and "push" in the coup. So often happens that a boxer is knocked unconscious after a hook up (moving from the waist and legs) and is less common but be knocked out by a jab. Although both blows are applied by the same arm with the same force, but in the first case, a large percentage of the weight was applied in the art.

Source: JON Chanani. - Physics of Strikes
University of Virginia, Charlottesville, VA 22903
adapted, interpreted and modified by Paul Cirigliano.