Friday, June 19, 2009

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EXPLANATIONS:


a car battery.



The starting battery is a rechargeable battery and provides power to the starter motor of a combustion engine like a car, for an aggregate of power or gas turbine aircraft . The batteries used as energy source for the traction of an electric vehicle batteries are called water drive vehicles can use either of the two types of batteries.

The start of a combustion engine using the starter motor required for a short time very high currents from hundreds and thousands of amperes. The starter battery has to meet this requirement in winter at low temperatures. Moreover, the electric voltage can not be reduced significantly during the boot process. That's why starting batteries have a small internal resistance.

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SCHEDULE: ELECTRICITY AND MAGNETISM.

Tuesday, June 16, 2009

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Pile on its positive pole has a red bar means

milliamp current intensity: the amount of cargo passing through each conductor:

1. "They look normal bulbs?
No, look less, because the voltage is divided between the two bulbs.

2. What if a bulb blows?
two MLAs are extinguished, as the circuit loses its continuity (it is open to families).

3. What if we make a short circuit to a lightbulb? Cutouts
direct connection between two points with a wire or direct contact. The bulb stops working and the other lights off and more because all the voltage reaches her.


1. "They look normal light bulbs?
If, 'cause they are directly connected to the generator.

2. What if we make a cutout of one of the bulbs?
For all the current passes through the short, but dangerous, because it is a short circuit to the generator.


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Electromagnetism. PRACTICAL CIRCUIT


MAGNETS: dede known antiquity, magnetite is an iron mineral that has magnetic properties.



MAGNETISM: It force produced by magnets and electric currents and acts on other materials such as iron.


call North Pole to the extremity of the magnet that is oriented to true north and south pole to the contrary. Grujula
A: is a magnet in the form of chapita that is oriented north freely.


These magnetic lines formed to sprinkle iron filings around the magnet, are magnetic field lines.
The forces that magnets exert on each other is a different type of Attraction:
The earth has a core iron to make it behave like a big magnet.

The Earth's magnetism is very important for life and protects us from the intense radiation (charged particles that spin at high speed) that comes from space and turns toward the polar auroras produced boreares.


electromagnets.

early nineteenth century was discovered that electric current produces magnetism.

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electricity and magnetism.

ENERGY.

- The electrical energy.
- electrical components and circuits.
- Electrical Magnitudes.
- Measurement of electrical quantities.
- Electromagnetism.
- Electrical Machines. Dynamos and alternators.
- electric motors.

THE ELECTRICITY.

All matter consists of atoms that have a positive nucleus and negative electrons in the crust.



A body is loaded and has power when you have electrons more or less.

I. ELECTRICAL CIRCUITS AND COMPONENTS

The driver circuits are formed by closed trajectories along which the electrons.
An elementary circuit has a generator, drivers and receptor. Also installed in the switching elements and control.



The most common control elements are:

SYMBOL

NAME

button

switch

switch

Key

crossing or crossing

relay


SERIES AND PARALLEL CIRCUITS.

There are several ways to connect the elements of electrical circuits: Circuit
series - are connected one after another and each element is subject to a different voltage, but all they will travel the same current. If one element disconnects all are without power. If one element is disconnected everyone is energized.
parallel circuit - All elements are connected to the same deos points.
In these circuits all items are subject to the same voltage and each runs a different current intensity. If you disconnect one, the other suguen working.
mixed circuits - are a mix of serial and parallel.

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ELECTRICITY AND FIGURES.

ENERGY.

Index:
- The electrical energy.
- electrical components and circuits.
- Electrical Magnitudes.
- Measurement of electrical quantities.
- Electromagnetism.
- Electrical Machines. Dynamos and alternators.
- Electric motors.

ELECTRIC POWER.

All matter consists of atoms that have a positive nucleus and negative electrons in the crust.



A body is loaded and has power when you have electrons more or less.

I. ELECTRICAL CIRCUITS AND COMPONENTS

The circuits are being formed by drivers in closed paths along which the electrons.
An elementary circuit has a generator, drivers and a receiver. Also installed in the element of manidora and control.

Friday, June 12, 2009

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Ohm's law and power law.

Any driver of the current is symbolized by a resistor.

The resistance of a conductor which measures the opposition to current flow.
This resistance depends on the drivers and their dimensions.
The unit of resistance is the Ohm.


If we make the ratio the voltage and current the result is constant and equal to the resistance of the conductor.

power law.

power is called a device that transforms energy per unit time. It is measured in Watts (W).

P = V ‡ I

All sections have a maximum power that can be applied before breaking. For example, check that the resistance of our circuits can withstand a maximum 2w.
current passing through conductors produce heat (Joule effect).


SERIES CIRCUIT CALCULATIONS.

How much current circulates through a series circuit?

I = V / Re = 9 / 20 = 0.45A = 450mA


CALCULATION OF THE INTENSITY OF A PARALLEL CIRCUIT.

To calculate the equivalent resistance of a parallel circuit of 2 elements are multiplied together and divided by their sum.

Re = R1 R2 / R1 + R2


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CIRCUITS.


·
circuits are made by drivers in closed paths along which the electrons.

Elementary circuit: has a generator, drivers and a receiver. Also installed in the element of maneuver and control.

parallel circuit: All elements are connected to the same two points. In these circuits all items are subject to the same voltage and for each a current flows differently, if you unplug one, the others still work.

circuit in series: are connected one after another and each element is detected in only one strain different, but all of them will travel the same current. If one of the switches all are without power.


Mixed Circuit: are a mix between series and parallel.

Monday, June 8, 2009

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THE SPANISH EMPIRE. KARAOKE



main conflicts CARLOS I STAYED DURING HIS REIGN.
- Conflicts in Aragon:
in the territories lifting movement was the Germania. Valencia artisans had the privilege of the reign of Ferdinand to form militias if necessary to combat Barbary fleets. In 1519 Charles V allowed the formation of the militias and put in command of Joan LLurenc.
In 1520 when there was a plague epidemic in Valencia and the nobles left the area, the militia took power and disobeyed the order of Hadrian inmdiata Urtreth of dissolution.
Within days the movement came to the Balearic Islands where it lasted until 1523.
After the defeat of the villagers, the army ended the conflict in the Germania.


- Conflicts over Castilla communities.

The arrival of Carlos Castilla marked the arrival of a young novice who was unaware of the constumbre and languages \u200b\u200bof his reign, as he put his trust in its employees borgoñores who had accompanied him from the Netherlands, to which He gave her high dignity and access to income and wealth. This annoyed the Spaniards and so it was told in the Cortes of Valladolid in 1518, which was ignored by the king. Immediately became the king of Aragon, and eventually this annoying to the Spaniards and had remained in Castile bastante menos tiempo, así que cuando conoció en Barcelona que había sido electro rey de romanos convocó Cortes en Santiago de Compostela para conseguir subsidios para sufragar sus gastos en el extranjero, las ciudades se opusieron puesto que no entendían la preferencía de los intereses en Alemanía frente a los castellanos y requerían su presencia en el reino. Finalmente el servicio se aceptó y Carlos embarcó para Alemanía, nombrado como regente al cardenal Adriano de Utrecht. El malestar se fue extendiendo por Castilla, y el incendio de medina del campo extendió el foco de la rebelión comunera por Castilla. Las revueltas antiseñariales provocaron que la nobleza apoyará al Emperor acptación the movement was losing in the cities. comuneras Finally, under the command of Juan de Padilla, were defeated at the Battle of Villata (Valladolid) and the return of the king made organizational changes in the kingdom which was particularly apparent after the Cortes of Valladolid in 1523.

- The Peace of Cateau-Cambresis.

was the most important treaty for Europe since the sixteenth century
, for the duration of their agreements, which are valid for a century, and it will lead to a new international situation. Marked the beginning of the preponderance English, and therefore a displacement of problems to the West, gravity still marked by the union of Portugal to the English monarchy in 1580.


- Battle of Lepanto.
"the grandest occasion ever saw"
was a naval Attacking utmost importance that took place on October 7, 1571 in the Gulf of Lepanto, off the town of Nafpaktos (Lepanto misnamed ), located between the Peloponnese and Epirus and mainland Greece. Fought this battle the Ottoman Turks against Christian coalition called Holy See, formed by Spain, Venice, the Holy See Génovay Christians were victors, saved only 30 Turkish galleys. Slowed and Turkish expansionism in the western Mediterranean. Despite the decisive participation of the Italian states, the English victory can be considered as the real battle Thirds held him on board.

- Defeat of the Armada.

La Grande and Navy Felicissimo , commonly known as Armada or English Armada, was the name of Philip II gave the large fleet assembly from 1588 to invade England during the Anglo-English War of 1585-1604. Shipping by Philip II of this fleet, intending to invade and control of British foreign policy (particularly with regard to piracy and the war in Flanders), marked the beginning of hostilities in a war that eventually Spain, however, the naval campaign was considered a English defeat and the loss of ships in the storm, as the epic struggle between two titans and prevented the landing of 30,000 men on the English coast. England managed to request and sign a peace treaty favorable to the interests of the English monarchy in London (1604)


Friday, June 5, 2009

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Tuesday, June 2, 2009

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ECOSYSTEMS.

Friday, May 29, 2009

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ECOSYSTEMS.



DEFINITION OF ECOSYSTEMS.

is the set of living things that occupy a natural space and the relations established between them and the environment in which they live .

BIOCENOSIS.

the whole population is living in an area.
individuals in the community who belong to the same species form a population.

BIOTYPE.

The place or physical environment occupied by a community that is characterized by well-defined environmental conditions.

ECOLOGY.

is the science that studies the relationships between living beings and others as well as between them and the physical environment around them. His unit of study is the ecosystem, consisting of the biotope and biocenosis.

ECOSYSTEM = BIOCENOSIS + BIOTYPE



abiotic factors.

The environment of an organism is constituted by all the factors or conditions that exist in a place where you live and which influence him at some point in their lives.
abiotic factors are the physical and chemical characteristics that have a medium. Not directly dependent on living things, although its activity can be modified.

ENVIRONMENT.

each living environment.
- Factors influence climate: temperature, light and moisture.
- hydrological factors influences: temperature, light, salinity and dissolved gases.
- Factors influencing soil: physical structure and chemical composition.

biotic factors.

are those that arise as a result of the presence of other living beings, as the struggle for food or space, or mutual aid.
is a community consisting of organisms of different species including establishing multiple relationships.
These relationships can be: intraspecific and interspecific.

terrestrial ecosystems. Biomes.

are large ecosystems of beings lived communities that occupy a physical space with specific environmental conditions. MARINE

.

· neritic: includes the area above the continental shelf.
· Ocean, located beyond the continental shelf.
· Pelagic: This is the illuminated area.
· bathyal: Located between 200 and 2,000 meters deep.
· Nether: the deepest part of the ocean.
marine areas are established according to the presence of light, the nature of the seabed, waves or currents.



trophic levels.

· Producers: They are autotrophs that produce their own organic matter from inorganic matter.
are plants, algae and photosynthetic bacteria.

· Consumers: They are heterotrophic organisms that feed on living material. There are several types:
- Primary: are the animals that feed on plants, also called herbivores.
- Secondary: feed on primary consumers. They are carnivorous animals. In some ecosystems may be tertiary or quaternary consumers.

· Decomposers: These are heterotrophic organisms that feed on remains of living organisms or their droppings and converted to inorganic compounds. Are fungi and many bacteria. PRESENTATION

trophic levels.

living beings depend on each other for food.
* The trophic structure of an ecosystem can be represented in several ways:
- A food chain consists of a linearly ordered set of organisms where each feeds off the previous serves, in turn, feed the next.
- A food web is a set of interconnected food chains in an ecosystem can be established.
- ecological trophic pyramids are forms of representation that are used to show how they change some features of the trophic levels to provide the value of the property being measured.

MATTER AND ENERGY FLOW.

organic matter serves as food producers to primary consumers of these, in turn, are eaten by secondary consumers. All of these organisms to die, generate organic waste.
- Producers convert energy solar energy into chemical energy. Passing through each trophic level of the energy is released in the breath and gave the environment as heat.
Another part of the energy goes straight to the individual organic when they die.

CHANGES IN STOCKS.

population growth is the increasing number of individuals that form over a period of time depends on the fertility, mortality, migration and immigration.
- The interactions between different species affect the size of their populations.

succession.

* Succession Primary succession is called primary if it starts in an area that has never been colonized. For example, a newly formed dunes.
* Secondary Succession: this term if it is set in an area where previously there was a community that has been partially or totally eliminated.
For example: a forest that has suffered a fire.

- A succession is not only an increase in the number of species, but the replacement of one community by another increasingly complex to reach the climax community.

Tuesday, May 26, 2009

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energy table. CONCEPTUAL SCHEME


ENERGY SOURCES

NAME

EXAMPLE

Hydraulic

Pantano

Thermal

Stove

Solar

A solar central

Radiant

A cat in the sun


ENERGY SOURCES

RENEWABLE

NONRENEWABLE

Sun

Coal

Wind

Petroleo

Los rios

Gas natural

Mares y océanos

Temperatura



ENERGY TRANSFORMATION

EXAMPLE

E. INITIAL

E. END

Aerogenerados

Eólica

Electrical

bulb

Eléctrica

Luz / Calor

Lavadora

Eléctrica

Cinetic

Photosynthesis in green plants

Radiant

Chemistry



Monday, May 25, 2009

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