Does hot water can freeze faster than cold water? wow, at first glance like a stupid question question alone. This is precisely studied by scientists. Let us analyze a little. Water will freeze in a temperature of 0 degrees Celsius.
But do not forget that water could kill bacteria E. coli in a temperature of 50 degrees Celsius in a longer time than cold water on the coast of New England with a temperature of 15 degrees centigrade which is in the process of becoming ice. From the fact that we can assume that hot water can freeze faster than cold water, under certain conditions.
This natural oddity called Mpemba effect, named for high school students in Tanzania, Erasto Mpemba who first observed that state in 1953. Mpemba effect occurs when two parts of water with different temperatures are exposed in the Subzero, and hotter airyang freeze first. Mpemba observation has been matched by a number of ideas first, like Aristotle, Rene Descartes and Francis Bacon, who also thought that hot water can freeze sooner than cold water.
Evaporation is the most plausible explanation for this situation. When hot water is placed in open containers began to cool, the overall mass reduction occurred simultaneously with the evaporation of water. The less amount of water that freezes, then the amount of time needed is also vanishingly small. But this is also not always successful, especially when done in a closed container that prevents evaporation.
It may be that evaporation is not the only reason why the hot water can freeze faster. The existence of nonuniform temperature distribution in the water could also explain the occurrence of Mpemba effect. Hot water rises to the top container before it goes shu, replace the existing cold water underneath. Movement of hot water rises and cold water down is called a convection current.
Well, if you want to make ice cubes in the freezer refrigerator, it's better to use hot water only for quick frozen, and fast drinking ice ...
(KF-BAS/V/koranbaru.com)
Monday, May 30, 2011
PALM OIL IS NOT FRIENDLY ENVIRONMENT
In Indonesia, many people argue that the attempt in the oil palm is a way of making a living are very profitable and also environmentally friendly. Besides, other than can be consumed, palm oil can also be used as fuel
But the Dutch environmental organization Environmental Defense Milieudefensie or judge, the use of palm oil as fuel, more environmentally damaging than conventional fuels such as diesel. Environmentalists Netherlands in partnership with Indonesian Forum for Environment (WALHI) is concerned about the fate of native forests in Indonesia are a lot cleared by various companies.
For example Ritsema said Malaysian palm oil company which he considered a major cause of environmental pollution in Indonesia. "We have been researching how they operate. They are, among others, guilty of illegal deforestation. We managed to disassemble the case and has prepared a report about it. Then we talk with these companies, but to no avail."
Therefore Milieudefensie complained in a joint organization of palm oil industry. "This way we do insistence," said Ritsema. Ritsema added, generally in Indonesia, deforestation occurs extraordinary. Therefore, Indonesia is one of the countries that most spewing CO2 emissions. China's number one, followed by America and then Indonesia.
"It's weird, because Indonesia is not the most advanced industrial countries. But that CO2 emissions caused by forest cleared lot," said Ritsema. Because the trees are logged, then diminished trees suck up CO2, obviously Ritsema. However, now in Indonesia, many tree planting projects, such as what is done by various NGOs in Java. According to Ritsema, the projects would not be able to compete against the onslaught of deforestation earlier. "The benefit is less if trees are planted but still cleared forest. This is a setback"
However Ritsema see these projects have benefited. "I think that tree-planting project is also its positive impact. But it still will not be metralisir impact of jungle deforestation. Tree-planting project was not going to be able to recover the jungle." KF-Newspapers Residents / ar / Radio Netherlands.
But the Dutch environmental organization Environmental Defense Milieudefensie or judge, the use of palm oil as fuel, more environmentally damaging than conventional fuels such as diesel. Environmentalists Netherlands in partnership with Indonesian Forum for Environment (WALHI) is concerned about the fate of native forests in Indonesia are a lot cleared by various companies.
For example Ritsema said Malaysian palm oil company which he considered a major cause of environmental pollution in Indonesia. "We have been researching how they operate. They are, among others, guilty of illegal deforestation. We managed to disassemble the case and has prepared a report about it. Then we talk with these companies, but to no avail."
Therefore Milieudefensie complained in a joint organization of palm oil industry. "This way we do insistence," said Ritsema. Ritsema added, generally in Indonesia, deforestation occurs extraordinary. Therefore, Indonesia is one of the countries that most spewing CO2 emissions. China's number one, followed by America and then Indonesia.
"It's weird, because Indonesia is not the most advanced industrial countries. But that CO2 emissions caused by forest cleared lot," said Ritsema. Because the trees are logged, then diminished trees suck up CO2, obviously Ritsema. However, now in Indonesia, many tree planting projects, such as what is done by various NGOs in Java. According to Ritsema, the projects would not be able to compete against the onslaught of deforestation earlier. "The benefit is less if trees are planted but still cleared forest. This is a setback"
However Ritsema see these projects have benefited. "I think that tree-planting project is also its positive impact. But it still will not be metralisir impact of jungle deforestation. Tree-planting project was not going to be able to recover the jungle." KF-Newspapers Residents / ar / Radio Netherlands.
5 FACTS ABOUT HIV / AIDS NEED TO KNOW
HIV / AIDS cases in Indonesia, the more alarming. In Indonesia, the cumulative cases of HIV and AIDS from January 1987 until March 31, 2009 only, consisted of 6668 HIV cases, 16,964 AIDS cases. The proportion of cumulative AIDS cases by age groups, among others under the age of one year reached 135, ages one to four years to reach 175, ages five to fourteen years to reach 88. Aged fifteen to nineteen years to reach 522, age twenty to twenty-nine years to reach 8567 cases. While the age of 30 to 39 years to reach 4997, aged 40 to 49 years to reach 1427, aged 50 to 59 years to reach 404, age above 60 years to reach 91, and unknown patient reaches the age of 558 cases.
From this data, patient age and earning quite a lot of teenagers. This is alarming. Most teens consider HIV as a disease that is not dangerous. Worse yet, a lot of understanding of HIV / AIDS. Let's look at 5 facts about HIV / AIDS that must be known to teenagers:
1. HIV indiscriminate
Since the HIV epidemic began 20 years ago, the stereotypes that circulate in society about persons with HIV are gay men, drug users and commercial sex workers who get that label. In fact, everyone can get HIV, from old age, young, rich, poor, women, men, and children - children and from various professions.
2. Oral sex is not as safe as thought
Oral sex is often considered a way of "safe" sexual intercourse. In fact, based on research, the infected body fluids such as semen and vaginal secretions containing high concentrations of the HIV virus can enter the bloodstream through the mucous membranes of the mouth.
3. Do not just worry about pregnancy
Many teens believe, one - the only risk of unprotected sex is pregnancy. Therefore, taking birth control pills, oral sex and ejaculation outside to prevent pregnancy. In fact, many things to worry about than pregnancy, namely the existence of sexually transmitted diseases (STDs) such as syphilis, herpes, including HIV that could threaten life.
4. Sometimes people are not telling the truth and we do not know the truth
Think for a moment the above sentence. How many people who admit that they suffer from HIV when asked by his new partner? How many people who acknowledge their sexual lives when they know someone new? How many people are really - really know their HIV status and health status of people - people with them before?
A statement "My partner does not have HIV" can only be accepted if accompanied by tangible evidence of a negative HIV test. Ask clearly their HIV status and ask them to do the tests as evidence, nor from ourselves.
5. There is no cure for the killer
Although people with HIV / AIDS (PLWHA) to live longer thanks to antiretroviral drugs, these drugs do not cure. If any of these drugs protect against opportunistic infections is not a "shortcut" from HIV infection. These drugs even cause side effects such as diarrhea, excessive fatigue, redness, nausea and vomiting. So, you should consider before you go too far and ruin your future, because HIV is a "silent killer", the silent killer that obviously will make you regret in the future because of it.
KF-Newspapers Residents / v / Dr. Diamond Airlina Febiliawanti
From this data, patient age and earning quite a lot of teenagers. This is alarming. Most teens consider HIV as a disease that is not dangerous. Worse yet, a lot of understanding of HIV / AIDS. Let's look at 5 facts about HIV / AIDS that must be known to teenagers:
1. HIV indiscriminate
Since the HIV epidemic began 20 years ago, the stereotypes that circulate in society about persons with HIV are gay men, drug users and commercial sex workers who get that label. In fact, everyone can get HIV, from old age, young, rich, poor, women, men, and children - children and from various professions.
2. Oral sex is not as safe as thought
Oral sex is often considered a way of "safe" sexual intercourse. In fact, based on research, the infected body fluids such as semen and vaginal secretions containing high concentrations of the HIV virus can enter the bloodstream through the mucous membranes of the mouth.
3. Do not just worry about pregnancy
Many teens believe, one - the only risk of unprotected sex is pregnancy. Therefore, taking birth control pills, oral sex and ejaculation outside to prevent pregnancy. In fact, many things to worry about than pregnancy, namely the existence of sexually transmitted diseases (STDs) such as syphilis, herpes, including HIV that could threaten life.
4. Sometimes people are not telling the truth and we do not know the truth
Think for a moment the above sentence. How many people who admit that they suffer from HIV when asked by his new partner? How many people who acknowledge their sexual lives when they know someone new? How many people are really - really know their HIV status and health status of people - people with them before?
A statement "My partner does not have HIV" can only be accepted if accompanied by tangible evidence of a negative HIV test. Ask clearly their HIV status and ask them to do the tests as evidence, nor from ourselves.
5. There is no cure for the killer
Although people with HIV / AIDS (PLWHA) to live longer thanks to antiretroviral drugs, these drugs do not cure. If any of these drugs protect against opportunistic infections is not a "shortcut" from HIV infection. These drugs even cause side effects such as diarrhea, excessive fatigue, redness, nausea and vomiting. So, you should consider before you go too far and ruin your future, because HIV is a "silent killer", the silent killer that obviously will make you regret in the future because of it.
KF-Newspapers Residents / v / Dr. Diamond Airlina Febiliawanti
DIENG ALERT ONE
Since Sunday night, May 29, 2011, Mount Dieng in Central Java increased its status into Standby or Level III. Head of the Indonesian Red Cross (PMI) Banjarnegara, Edi Purwanto, said he had to anticipate disaster. "There are three aspects namely asessmen, logistics and public kitchens. The others remain, but more focus on it," Edi said when contacted VIVAnews.com, Monday, May 30, 2011. Related poison gas, Eddie admitted his side has not distributed the masks in public. "Masks we do not provide because the price is still expensive, but we accommodate if anyone wants to give aid," he said. For a while, new masks were distributed to the officers who monitor the Dieng. According to him, the community would remain safe if they adhere to the information given by the authorities. "What is important to follow instructions disaster management body," he said.
Previously, the disaster management agency has banned tourists and residents approached the crater Weigh since release CO2 gas that can interfere with breathing. Although in practice, there are also residents of reckless activity within 3 kilometers from the crater. Related to the poisonous gas, the Indonesian Red Cross of Central Java province is ready to evacuate on Sumberejo Village residents who live near the mountain Dieng, Wonosobo. A total of 140 heads of households (HH) or about 510 people from the village of Hamlet Sumberejo Simbar, and 151 families or approximately 669 people from Hamlet Serang, and hundreds of Hamlet Kaliputih ready to be evacuated. KF-Newspapers Residents / ar / VIVAnews
Previously, the disaster management agency has banned tourists and residents approached the crater Weigh since release CO2 gas that can interfere with breathing. Although in practice, there are also residents of reckless activity within 3 kilometers from the crater. Related to the poisonous gas, the Indonesian Red Cross of Central Java province is ready to evacuate on Sumberejo Village residents who live near the mountain Dieng, Wonosobo. A total of 140 heads of households (HH) or about 510 people from the village of Hamlet Sumberejo Simbar, and 151 families or approximately 669 people from Hamlet Serang, and hundreds of Hamlet Kaliputih ready to be evacuated. KF-Newspapers Residents / ar / VIVAnews
PERTAMAX PRICE DOWN.
Pertamax price decreased by Rp 350 per liter. The selling price of fuel oil (BBM) nonsubsidized became Rp 8,900 per liter. "Prices have come down since pertamax 00.00 pm today (Monday, May 30, 2011),"said VP of Communications of PT Pertamina (Persero), F Aaron when talking with Legal in Jakarta on Monday (5/30/2011).
Earlier, the price of this pertamax sold at Rp 9250 per liter in the greater Jakarta area. With prices falling, the price fell to Rp 8,900 pertamax. "In other areas also decreased," he explained. Aaron explained that this pertamax price decline is due to oil price which is the raw material for production of this pertamax decreased. "Oil prices used for this pertamax gasoline is gasoline 90 and 95. The price of oil these two go down, so pertamax also down." KF-Newspapers Residents / ar / Okezone.
Earlier, the price of this pertamax sold at Rp 9250 per liter in the greater Jakarta area. With prices falling, the price fell to Rp 8,900 pertamax. "In other areas also decreased," he explained. Aaron explained that this pertamax price decline is due to oil price which is the raw material for production of this pertamax decreased. "Oil prices used for this pertamax gasoline is gasoline 90 and 95. The price of oil these two go down, so pertamax also down." KF-Newspapers Residents / ar / Okezone.
Subscribe to:
Posts (Atom)