The coffee marker is a container that allows to prepare and sereve coffee (hot drink), is obtained by making an infusion of the fruits and seeds of the coffee, its method of preparation has evolved over time with increasingly sophisticated machines for its preparation, without however, the physical principle does not change and consists of the solubility of caffeeine (C8H10N4O2) in water, a coffee maker is based on the effect of temperature on the solubility of coffee in water.
Types of coffee maker:
1.Italian coffee maker
The italian coffee maker or moka coffee, also populary know as greca or macchinetta ( in Spanish " maquinita " ) is an espresso coffee maker that brews coffee by means of steam
2.Drip coffe maker
A drip of filter coffee maker can be defined as an electricity-operated hou sehold appliance consisting of a water tank which is heated and passed though the ground coffee which is deposited on a paper or aluminum mesh filter or steel to produce coffee.
3.Coffee maker plunger
Is a simple device to make coffee or tea and usually providies stronger coffee than other coffee makers
4.Express coffee maker
In express coffee makers the advantage is that we can use the ground coffee blend exactly as we want, which means the customization options are greater. The more purists of coffee tend to prefer espresso coffee makers for this reason
5.Capsule coffee maker
Are much easier to handle, possibly also faster in operation, but in return for that your drinks are limited to the exclusive capsules of the brand that you choose. If you do not like the taste of you coffee makerś capsules, you will not have many alternatives.
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Apparatus independent or integrated in a refrigerator, capable of freezing food, as weel as producing ice.
Freezers do not really work by cooling things down, but they take away the heat. They use an evaporation process to remove the heat and leave the food frozen. To carry it out, some very special components are used.
A freezer works by removing heat from the compartment. To begin with the process, the refrigerant, which acts as a gas, goes inside the compressor, where all the compression causes in to overheat. The hot gas moves through other coils ans begins to cool, which causes the gas to become liquid. While continuing in this form, it is sent to an expansion valve, which has a very small opening through which the coolant passes and where it becomes a very cold haze. As the steam passes through the compartment, is begins to evaporate and returns to the gas. The temperature of the fog at this altitude is around -27 degrees Fahrenheit (-33 degrees Celsius) and carries heat from the compartent along with it. The refrigerant begins to heat up again when it is removed from the heat and is returned to the compresssor to start the process again. Each time the coolant renews the cycle, it removes more heat from the compartment until it is no longer present. This is what causes the food to freeze.
Freezer types:
1.Vertical freezer.
2.Small freezer
3.Industrial freezer
RADIO
The radio is a medium of communication that is based pn the sending of audio signals throught radio waves , althought the term is also used for other forms of sending audio remotery as the internet radio.
In the year 1873 the Scottish physical James Clerk Maxwell formulated the "electromagnetic waves" theory, which are the basis of the radio. In 1887 the the German physical Heinrich Hertz discovered the the "radio waves" and in 1894 NIkola Tesla does his first demonstrtion of a radio broadcast.
Shortly in 1895, the Italian Gillerme Marconi made the first radio system achieving in the 1901 to send signals to the edge of the Atlantic.
There are different types of radios:
Internet radio: Is the first and the simplest.
Is an onlyne broadcast.
Low power radio: Opposes the imposition of a commercial menalage.
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| COMMON RADIO |
Digital radio:Need a small antena.
DAB
IBOC
DILM
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| NEW RADIO |
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| OLD RADIO |
