How many human already they had died in the world?

Many historians had worked in order to calculate how many Homo sapiens already had passed for the planet. Being based on the period of its appearance in the Land - of 50.000 the 100,000 years behind - and in the amount of men that had inhabited different regions during all History, the scholars had arrived the numbers that vary of 34 the 105 billion inhabitants. The imprecisão if must to the scarcity or total absence of registers and documents in some periods. Currently, they live in the planet about 6 billion people.

What it was the tariff White Alves?

In 1844, aiming at to solve the great deficit financial why it was passing, the imperial Government decreed a new politics with regard to the customs tariffs. In accordance with it, about three a thousand imported articles would start to pay taxes that varied of 20 60%. The majority was taxed in 30%, being the tariffs highest for the foreign merchandises that already could be produced in Brazil. Although the objective of the Tariff White Alves was only to generate more resources for the Government, the measure finished for favoring the growth of new national economic activities. Proposal and elaborated by then the Secretary of the Treasury Manuel White Alves, it was known as Tariff White Alves.

What sunday was “bloody”?

“Blood Sunday” or “Bloody Sunday” happened in day 30 of January of 1972, when catholics of Ireland of the North had been tothe streets pacifically. They protested against the discriminatory laws imposed by the protestant majority. The British troops had shot against the manifestants, having killed 13 people. Another catholic died days later in virtue of the wounds. Until today the minority catholic of Ireland of the North he fights for the annexation of the territory to Ireland, of majority catholic. Already the protestants want that the country continues being subordinated the United kingdom, of protestant majority. The “bloody sunday” unchained a terrorist scaling of violence and acts. The event was remembered by the Irish band U2 in music “Sunday Bloody Sunday”, recorded in 1983.

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Heat

* The point hottest of the planet is ElAzizia, in the Lybian. In 13 of September of 1922, the temperature of the place arrived at 58ºC.

* Since 1900, the world-wide temperature went up 0,6ºC. It is growing three times faster than the first half of century 1920.

* The body produces sweat to keep its thermal balance. This occurs when the ambient temperature exceeds 24ºC. If the temperature of the body is above of 37ºC, the individual has hipertermia. Below from 35ºC, it suffers hipotermia. In both the cases, the symptoms are collapses, giddiness, vomits, fall of the arterial pressure and convulsion. Above of 43ºC, the organism enters in collapse.

* Hipotálamo is the thermometer of the body. It makes responsible for setting in motion the glands sudoríparas when he perceives the increase of the heat.

* The testicules need to remain 1ºC below of the temperature of the body. Senão, has problems in the manufacture of sperm. Already the areas of bigger sanguine flow costumam to be hotter than excessively.

* People who sweat excessively possess a called riot hiperhidrose. The inverse illness was baptized of anidrose. Who does not have no gland sudorípara in the body suffers from hipohidrose.

* The men sweat more than what the women, because the testosterone keeps its sped up metabolism. The blacks, in turn, gain of the whites and Asians in this question. Its dark skin holds back more heat.

* The light of the Sun contains radiations that, in excess, can be harmful to the organism. Beyond skin cancer, they cause cataract and precocious aging of the eyes.

* The heat is propitious to the proliferation of bacteria that if develop in the gastrintestinal system. Therefore it is that, in the summer, it increases the incidence of cases of would desinteria.

* Fatter people feel more heat. This happens because who is above of the weight produces more calories and, thus, the fat helps to keep them warm.

* In the 2003 summer, a above-normal wave of heat killed 14,800 people in France, in its majority aged women.

* The city of Brasilia had the day hottest of history in 28 of October of 2008. The thermometers of the capital had marked 35,8ºC.

It will be that it goes to rain?

The clouds generally are white because of the great concentration of microgotículas of water and small ice crystals. They act as smallprisms, decomposing the solar light in the colors of the rainbow (red, orange, yellow, green, blue, indigo and violet). For who it looks at the cloud, the result is the addition of all these colors, that of the white o.

Microgotículas of water appears with the condensation (ticket of the gaseous state for the liquid) of the vapor of the atmosphere. These gotículas, whose diameter is of thousandth of centimeters, are very light and are floating. When if they only join due the shocks and forms bigger drops are that they gain weight enough to fall.

The rain clouds are darker because they do not allow that light crosses the solar them. The part biggest of the solar light is reflected and comes back toward the sky; another one obtains to cross clouds and a lesser part is absorbed by them (of 5% 10%). As rain clouds, calls of cúmbulos-nimbos and stratus-nimbos, they are sufficiently dense and they have great depth, the amount of light that passes for them is very small. If an airplane to fly over these clouds, them will seem sufficiently clear, therefore they will go to reflect almost all the light who receive.

The clouds are suspended in air for the constant evaporation and condensation of the water vapor that the form. The great altitudes, cold air provokes the fall of the water drops. When reaching the inferior hotter air layers, them evaporate and go up to condense another time, repeating the cycle.

To each as, 16 billion liters of water fall on the Land in rain form.

Cyclone

It is the result of the convergence of cold and hot air masses. The union of the masses creates an area of low pressure that attracts strong winds and provokes rain and much cloudiness. This phenomenon happens in all the parts of the world in different intensity.

Hurricane

An hurricane is a great iratória convergentcloud area g in activities of storm. A cyclone in advanced period of training can be considered. Costuma if to form in tropical waters: Atlantic Ocean North, Caribbean Sea, Gulf of the Mexico and in the eastern north of the Pacific Ocean. The nucleus of the hurricane is hot, what “it speeds” the condensation of the water. Thanks to this, it is common that hurricanes are folloied of strong sleets, which had to the fast freezing of the water drops in contact with clouds. One gave credit that the hurricane incidence in the south hemisphere was impossible, since they form themselves in tropical seas, however, the hurricanes that had happened in 1991 in the coast of Africa, 2004 for all the state of Santa Catarina and in the east of Salvador, had proved the opposite. Many scientists attribute the uncommon phenomenon to high in the temperature of the related oceans to the effect the greenhouse.

Tornado

They are located air columns, that if form between the base of clouds and the surface of the Land. It happens when the whirlwindof a cyclone finds the soil and costumam to last of 20 minutes to one hour. They are frequent in U.S.A., but they happen with little intensity in Uruguay, Argentina and some regions of Brazil, mainly in the south. The winds of these air columns can arrive the 350 km/h. The intensity is measured by Escala Fujita, that goes of F0 the F6. Become above of F5 they are we raríssimos. When it happens in oceans or on lakes and rivers, the phenomenon is called whirlwind of agua.

Clouds

Clouds are accumulations of water vapor, that if condense when reaching the atmosphere. They are esbranquiçadas because the vapor if transforms into small ice particles. These masses are well light and finish being pushed for the winds. When many clouds if join, and reach a bigger vapor concentration, happen the precipitation. The drops if join, are heavy excessively and fall in rain form.

Mist or fog?

Although seemed, the mist and the fog have different principles:

#the fog is caused by small particles of dust or smoke that is suspended in air. Although not to harm the visibility very, the fog leaves “cloudy” air. It is common good in great cities as São Paulo, when the precipitation index is low.

# the mist and the fog are accumulations of water particles that are suspended well in the atmosphere close or next to the surface of the Land. The fog is denser than the mist and harms the visibility very. It is common in humid places, mainly in the first hours of the day.

Animals can foresee disasters natural

Truth. The animals can foresee disasters, therefore they have more auditory sensitivity and of pressure perception. In the case ofan earthquake or a tidal wave, for example, the animals obtain to feel the different pressure of the habitual one, and are capable to catch the electromagnetic signals that the rocks produce to if breaching. Another factor that leaves the animals to the front of the human beings in the forecast of disasters is its hearing. The human beings catch sonorous waves between 1 a thousand and 4 a thousand cycles for second (cps). The men are not capable to listen to nothing above of 20 a thousand CPS. Dogs and cats, however, are capable to hear up to 60 a thousand CPS, while rats, dolphins and whales arrive 100 a thousand.