In a way to promote the tourism in Cáhuil, the Municipality of Pichilemu created the "Salt Route", that takes the tourists into places where the salt generation process is dpne. This travel starts in Pichilemu and includes Cáhuil, Barrancas, La Villa, El Bronce, La Palmilla and La Plaza. On this route are two rural ranches, "Oro Blanco" and "El Bronce".
In the Cáhuil zone are at least 46 birds species. Many of the species are in danger of extinction. Some of them are the coscoroba swan, larus maculipennis, garza cuca, among others. It hosts at least seven silvester ducks species.
Liceo Agustín Ross Edwards
Agustín Ross High School, Liceo Agustín Ross Edwards or just L.A.R.E. is a Chilean public high school located in the coastal town of Pichilemu. It is named after Agustín Ross Edwards, a Chilean politician and known by his works in the city.
The High School was created in 1979. It currently has 2 buildings. Has 562 students and 39 teachers. The education area of the High School is Humanistic Scientifical, Technical-Professional and Adult Education. As of 1998, the High School started using the Complete Scholar Journey ().
Derivative (mathematics)
In mathematics (particularly in differential calculus), the derivative is a way to show instantaneous rate of change: that is, the amount by which a function is changing at one given point. For functions that act on the real numbers, it is the slope of the tangent line at a point on a graph. The derivative is often written as formula_1 ("dy over dx", meaning the difference in y divided by the difference in x). The "d" is not a variable, and therefore cannot be cancelled out. Another common notation is formula_2—the derivative of function formula_3 at point formula_4.
The derivative of y with respect to x is defined as the change in y over the change in x, as the distance between formula_5 and formula_6 becomes infinitely small (infinitesimal). In mathematical terms,
That is, as the distance between the two x points (h) becomes closer to zero, the slope of the line between them comes closer to resembling a tangent line.
Derivatives of linear functions (functions of the form formula_8 with no quadratic or higher terms) are constant. That is, the derivative in one spot on the graph will remain the same on another.
When the dependent variable formula_9 directly takes formula_4's value (formula_11), the slope of the line is 1 in all places, so formula_12 regardless of where the position is.
When formula_9 modifies formula_4's number by adding or subtracting a constant value, the slope is still 1, because the change in formula_4 and formula_9 do not change if the graph is shifted up or down. That is, the slope is still 1 throughout the entire graph and its derivative is also 1.
Power functions (in the form of formula_17) behave differently from linear functions, because their exponent and slope vary.
Power functions, in general, follow the rule that formula_18. That is, if we give "a" the number 6, then formula_19
Another example, which is less obvious, is the function formula_20. This is essentially the same, because 1/x can be simplified to use exponents:
In addition, roots can be changed to use fractional exponents, where their derivative can be found:
An exponential function is of the form formula_26, where formula_27 and formula_28 are constants and formula_29 is a function of formula_4. The difference between an exponential and a polynomial is that in a polynomial formula_4 is raised to some power, whereas in an exponential formula_32 is in the power.
formula_33
Find formula_34.
formula_35
formula_36
formula_37
formula_38
Therefore,
formula_39
The derivative of logarithms is the reciprocal:
Take, for example, formula_41. This can be reduced to (by the properties of logarithms):
The logarithm of 5 is a constant, so its derivative is 0. The derivative of formula_43 is formula_44. So,
For derivatives of logarithms not in base "e", such as formula_46, this can be reduced to:
The cosine function is the derivative of the sine function, while the derivative of cosine is negative sine (provided that x is measured in radians):
Derivatives can be broken up into smaller parts where they are manageable (as they have only one of the above function characteristics). For example, formula_51 can be broken up as:
A function's derivative can be used to search for the maxima and minima of the function, by searching for places where its slope is zero.
Derivatives are used in Newton's method, which helps one find the zeros (roots) of a function..One can also use derivatives to determine the concavity of a function, and whether the function is increasing or decreasing.
Ruminant
A ruminant is a mammal that eats and digests plant-based food such as grass. Ruminating mammals include cattle, goats, sheep, giraffes, bison, yaks, water buffalo, deer, camels, alpacas, llamas, wildebeest, antelope, pronghorn, and nilgai. All of them are Artiodactyla, cloven-hoofed animals. The word "ruminant" comes from the Latin word "ruminare" which means "to chew over again".
Rumination works by chewing and swallowing in the normal way to begin with, and then regurgitating the semi-digested cud to re-chew it and to get the most food value out of it.
Rumination makes the half-digested food particles smaller, before they can go through the process of digestion.
The primary difference between a ruminant and non-ruminants (such as people, dogs, and pigs) is that ruminants have a four-compartment stomach.
The four parts of the stomach are the rumen, reticulum, omasum, and abomasum. In the first two chambers, the rumen and the reticulum, the food is mixed with saliva and separates into layers of solid and liquid material. Solids clump together to form the cud or bolus.
The cud is then regurgitated (brought up to the mouth) and chewed slowly. Fiber, especially cellulose, is broken down by microbes (bacteria, archaea, protozoa, and fungi).
Even though the rumen and reticulum have different names, they are the same functional space, as the digesta (food material) can move back and forth between them.
The digesta then passes into the next chamber, the omasum, where water and many of the mineral elements are absorbed into the blood stream.
After this the digesta is moved to the true stomach, the abomasum. Digestion takes place here.
The digesta is finally moved into the small intestine, where nutrients are absorbed. Water is absorbed in the large intestine, leaving the waste.
Almost all the glucose produced by breaking down the cellulose is used by microbes in the rumen, and so ruminants get little glucose from the small intestine. Instead, the ruminants' need for glucose (for brain function and lactation if appropriate) is made by the liver.
There are 3.5 billion domestic ruminants, with about 95% being cattle, goats and sheep.
There are also about 75 million wild ruminants. They can be found anywhere except for the continents Australia and Antarctica. Most of them are in Europe, Africa and Asia.
Renault Tracer
The Renault Tracer was a bus produced by Renault from 1991 to 2001.
The FR1 has a 9.8 litre 6-cylinder turbo diesel engine with 186 kW/253 hp.
In 2001, the Tracer were replaced by the Irisbus Arés.
Mercedes-Benz Sprinter
The Mercedes-Benz Sprinter is series of vans, trucks and buses produced by Mercedes-Benz in three generations since 1995.
Dodge and Freightliner made the same vehicle in the United States but with different names, The names were Dodge Sprinter and Freightliner Sprinter.
The second generation Mercedes Benz Sprinter, Dodge Sprinter and Freightliner Sprinter was created in 1995
In early 2000's, the model was improved at the front and back, It had a new grille, new bonnet, new bumpers and different headlamps.
The second generation Mercedes Benz Sprinter, Dodge Sprinter and Freightliner Sprinter was created in 2006
In 2014, the model was improved at the front and back, It had a new grille, new bonnet, new bumper and different headlamps.