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O mixtures A few words ...


During the course of 22 May on the classes of mathematics and natural sciences, have dealt with mixtures!
mixture is a combination of two or more elements or chemicals that when combined retain their properties. Mixtures can be divided into:

• -homogeneous mixture, the ingredients so you can not see. naked eye, using simple optical devices.
• -heterogeneous mixture, the components so we can see. naked eye or by means of simple optical devices.

then exchanged a few ways of separating mixtures (sendymentacja, dekandacja, distillation, crystallization) and have done some exercises. First polagało the administration of examples (both in nature and household), eg mixtures of cieczom solid, liquid, gas, etc. In the second exercise, our aim was among others wymślenie two ways to improve: an electric kettle, school benches, patent lock on the door, etc.

After completing these exercises wkonaliśmy experience. Each of us had to prepare a mixture of hair.

what we needed?

first About 20 beakers or jars,
second Water,
third Substances: milk, eggs, washing powder, clay, sand, cocoa, chalk, denaturant, dishwashing detergent,
4th Microscope,
5th Slides nakrwkowe,
6th Slides Basic,

What was the research problem ?

As the mixture will be "kept" under a microscope?
and
As the mixture is "zachowwać" in the beaker?

What was the hypothesis?

Under the microscope, will look the most interesting (see the most j) homogeneous mixture, while the homogenous mixture in the beaker will provide milk, cocoa, denaturant, washing-up liquid.

How did the test?

First, each of us poured into their little beakers of water, then added randomly selected substances. After adding zamieszaliśmy, wstrząsnęliśmy and prepared from a mixture of microscopic preparations, the appearance of larger intrigued us most;). Then qualified for each of the mixtures in a homogeneous or heterogeneous.

What were our findings?

After mixing the egg and water was colloid when mixed powder washing and water-mixture began to froth.

Our conclusions!

Under the microscope, can be seen only jenorodne mixture.
heterogeneous mixtures of water created when mixed with clay, sand, chalk. However, a homogeneous mixture of water created when mixed with denatured alcohol, liquid soap, milk, kakaa. After mixing the water with an egg or washing powder colloid formation.



At the end of all our mixtures (in addition to a mixture of egg and milk-aesthetic reasons in the course of the study;))) shed into one jar, and zakręciliśmy odstawiliśmy on the shelf. In this way, we created a waste;)

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Acquire


May 15, the classes of business, there was a long awaited moment ... namely GAME !!!!! ;))))
Once you have it laid out, you have to admit, she looked "scary": D But then everyone is familiar with the rules, a little thought, and the combined forces of her rozgryźliśmy;) All of us absolutely love the game and as long as no one has been bankrupt;) After the first game, "the richest" player he was our friend Michael, but all poprzysiągłyśmy himself in the next game you dodge it;)) We can not wait to we're playing again;)


ACQUIRE That is when unfolded;))

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reactions of exo-and endo-energy

11 May at the science classes we learned responses endoenergetyczne, egzoenergetyczne, endothermic and exothermic. At the beginning of classes saw what is going on in our crystal .. and we were pleasantly surprised! Crystals of us came out GREAT!! Then wylaliśmy residual solution, and our crystals moved to a Petri dish. Osuszyliśmy our crystals and compared with the substances prior to crystallization (we bought you a fancy camera, so we did a few bajeranckich photos that we put on our blog.)
our next task was to perform the reaction and thermal energy. In the experiment with sodium thiosulfate tube "wariowały" again became warm, and sometimes cold. High recognition in our eyes got sulphate of copper (II), because under the influence of heat lost his beautiful blue color. However, after adding a few drops of water to recover it again, and the evaporator had become hot.


So ...
endoenergetyczna reaction - a chemical reaction that absorbs energy from the environment in any form.

egzoenergetyczna reaction - a chemical reaction which resulted in releases to the environment energy. in any form.

endothermic reaction a chemical reaction, which has a negative balance of heat exchange with the environment. You can also say that this is a reaction in which heat is located on the substrate, or else that absorbs heat from the environment.

exothermic reaction is a chemical reaction , which has a positive balance of heat exchange with the environment. You can also say that this is a reaction in which heat is on the product page, or else that emits heat.


At the end of class, during the cleaning we had the idea to make your own solution ...., and what came out is our secret sweet;)))

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Banks;))


D present on May 8, the classes of business we have learned what are the banks, which the commission, and investment and credit.
Bank ... each of us probably more than once he was in the bank, everyone will know about it is, but many of us would be able to provide "expert" to answer the question:

What is the definition of "bank"?

A bank is a company operating the business of receiving deposits, granting loans, issuing money instruments electronic and other activities prescribed by law and listed in the statutes of the bank.

And what are the banking and what it really is?

services provided by banks to the banking law known as bank transactions. Banking operations are divided into:

• activities reserved exclusively for banks (the so-called banking activities in the strict sense):
  • accepting cash deposits payable on demand or on a specified date and keeping deposit accounts
  • creating and maintaining bank accounts;
  • lending;
  • provision of guarantees and letters of credit confirmation;
  • of bank securities;
  • organizing settlements;
  • issuance of electronic money instruments;
  • other actions that effect the law has been reserved exclusively for banks ;
• activities also allowed some non-bank entities (so-called banking activities in the broad sense):
  • lending money;
  • sureties;
  • bill and check operations, which are the subject of warrants;
  • term financial operations;
  • purchase and sale of debt (debt due may be sold by tender or by public offering);
  • outsourced activities in connection with the issuance of securities ;
  • safekeeping, securities, service of providing access to safe deposit boxes;
  • others mentioned in the Act;

And as we share the banks?

main types of banks in the banking system are:

• central bank
  
• operating banks (commercial, so-called service providers. massive customer)
  

There is also a breakdown of the banks because of the legal form of business:

• state banks (state-owned enterprises);
• co-operatives banks
  
• banks in the form of joint stock companies,

Banks are not co-operatives and credit unions (credit unions), but are often with them (and especially with cooperative banks) confused.

Everyone was curious to know which bank is the largest in the world, so we started to pry the Internet. And as it turned out, the world's largest bank by equity, it is an American bank, "CITIGROUP", while the largest bank by total assets is a Swiss "UBS". The largest banks in Poland are "PEKAO", "Pekao BP" and "BPH".

learned that the bank loan is to bring the bank to cash available to the borrower who undertakes return it together with interest at the contractual period. Basic features of the loan are:

• advisability, means financing using a bank loan a specific project,
• reflexivity, means an obligation to repay the loan amount together with interest at a fixed date,

Deposit is a contract between the customer and the bank, in which the customer provides the bank the money (assuming deposit in the bank) for a specified period of time. In exchange for remuneration in the form of interest.