Monday, 26 January 2015

Study Visa For China

Study chaina

If you think about moving to study in China for less than 180 days must apply for a visa X2. If you want to stay longer, for example, for an exchange year in college, you will need a visa x1.
In addition to the basic requirements must submit a letter of invitation from the school, the form JW201 (or JW202) issued by the Chinese Ministry of Education (you should send him your school along with the letter of invitation), the Supplemental Request Form Seen and Record of the physical 

examination for foreigners.

The student visa is only valid for 30 days from the date of the coming into China. 'then convert it to a compulsory temporary residence permit.

To obtain a residence permit, which still has to be renewed every year, you must provide various documents and a certificate of health issued by China Entry-Exit Inspection and Bureau.

Plasma 4th State of Matter


Three states of matter are widely known, the fourth state, plasma, remains mysterious and unknown to most people, however, the plasma as the fourth state of matter is essential to the existence of life.
Applying heat to a solid that it becomes liquid, that is melted, if it is followed by applying heat the liquid changes to gas and finally some electrons from atoms or neutral gas molecules emerge, forming a mixture of ions positively charged and negatively charged electrons.

The spectacular rays are an example of plasma 

When the gas is ionized, their properties have been altered so that bears little similarity to the other states of matter, for this reason it is considered that state of ionized gas as the fourth state of matter called plasma.

The sun is a good example of

Plasma characteristics are unique as it is the only state of matter that interacts with the environment, with the magnetic and electric field, and himself. The plasma state has a basic property of almost electrical neutrality, the number of positive and negative charges in the plasma are practically equal.



Psychology is the discipline that investigates the mental processes of humans and animals. The word comes from the Greek: psychological (mental activity or soul). This discipline analyzes the three dimensions of these processes: cognitive, affective and behavioral.

Modern psychology has been commissioned to gather facts about the behaviors and experiences of living beings, systematically organizing and developing theories for understanding. These studies help explain their behavior and even in some cases, predict their future actions.

For people who develop the study of psychology are called psychologists. This means, those who analyze the behavior of living things from a scientific approach. Sigmund Freud, Carl Jung and Jean Piaget are regarded as some of the pioneering psychologists.

The methodology of the study of psychology is divided into two main branches:

One that understands this discipline as a basic science (also called experimental) and employs a scientific-quantitative methodology (hypothesis contrasts with variables that can be quantified within an environment of experimentation),

Another that seeks to understand the psychological phenomenon through qualitative methodologies that enrich the description and help to understand the processes.


A twisting force that becomes a cause of rotation is called torque. "A key element in these force and torque balances is the hydrodynamic shear force and torque that the cell experiences when stationary on a planar surface."

The twisting effect may be generated by a torque, a torque. In circular sections, the effect of these loads is a torsional shear and torsional deflection (twisting angle).
As critical variables in the power transmission has torque, power and rotational speed.

Torque = Force x distance

T = F x d (54)

Being units of torque, Nm or N-mm in the international system, and lb-inch or lb-ft, in the English system.

Power = torque x rotation speed 

P = T x n (56)

Avogadro's number


Avogadro's number, corresponds to the number of elementary particles, atoms or molecules in a mole of substance.

The value of Avogadro's number can be achieved experimentally with measurements based on many different phenomena, for example on the kinetic theory of gases, the diffusion of light in the atmosphere, on radioactivity, on electrolysis. Its value corresponds to 6.022 • 1023 particles / mol.
one mole of any Essentially this always contains 6.022 1023 particles, whether they are atoms, molecules or ions.

Avogadro's number represents the number of entities contained in the unit mole.
For example:

One mole of K + ions corresponds to 6.022 1023 K + ions;

One mole of Fe atoms corresponds to 6.022 • 1023 atoms Fe

One mole of electrons corresponds to 6.022 electrons 1023

Avogadro's number, No is the proportionality constant which allows to determine, note the chemical amount n, the number N of particles contained in a sample through the following relation:

N= No n
n = N/No

in which:

N = number of particles
No = Avogadro's number = 6.022 • 1023 particles / mol
n = number of moles (mol)

Conversely, knowing the number N of particles contained in a sample, it is possible, through the inverse formula, determine the value of the chemical amount n.