SQUARES AND STICKS
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---------------------- Look at the sequence of figures below.
1) Draw the two figures that follow in sequence.
2) Calculate the number of sticks needed to draw the figure N ° 10
3) Noting some regularity, calculates necessary to draw stick figure ocuupa place 100 of that sequence.
4) If we call n the figure number, write a formula to calculate the sticks in n function.
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POSSIBLE SOLUTIONS
told The manner in which sticks found two different solutions but turned out to be two different ways to write the same formula. See ...
In the figure below, drag the slider and see how it follows the sequence.
This fellow was as follows:
Four sticks to the first set and then added three sticks for each of the following figures.
Move the slider to confirm. Have been painted a different color sticks that are adding figure to figure.
See if there is any relationship between the amount added 3 and the figure number in each case. To see more clearly, it should complete a table like the following. Remember to leave raised the operations.
The number of times that sum 3 is one less than the figure number!
That is:
sticks Qty = 4 + 3. (Figure number minus 1) If you call
n the figure number and p the number of sticks, then, to 4 must be added ( n - 1) times 3.
The formula here is:
ANOTHER WAY OF TELLING STICKS
That led to another formula. See ...
This companion aims to have the sticks like this:
Three sticks for each a stick figure at the end to close.
With what the formula here is:
No final decision yet for the launch day of the Planck satellite, which will be released along with the telescope Herschel on board the Ariane. The forecast was a launch in mid-April, in particular the 16th, but no date was postponed 
Afshar's experiment is controversial because the author says he refuted the principle of complementarity. This states that two descriptions, the wave and corpuscular, are needed to understand the quantum world, but are complementary: when it's one the other is not valid, and vice versa. This conclusion can be questioned as discussed below. 
In this experiment we know that if both slits are open it shows the wave behavior in the form of interference on the photographic plate to the right. If however we are able to determine the beginning and somehow the way that a particle took (slot S1 or S2), then the board does not appear to be interference and shows us corpuscular behavior. 
Afshar's experiment. The result is that there is no signal attenuation in the photographic plate. That is, there is interference between waves passing through each of the slots. 
spherical want to add? We start with r = 0 and we move to increasingly larger radii. Now we establish two hypotheses. First that the universe is infinite in extent. Two light sources that are eternal. Thus we see that the sum of spherical layers is infinite and that each layer contributes to a constant value (not infinitesimal) the total flux of light. The result is therefore infinite. This is the paradox of Olbers.