Tuesday, May 31, 2011

The physics story: Between Physics and God

Did God create everything that exists? Does evil exist? Did God create evil? A professor at a renowned university challenged his students with this question."Did God create everything that exists?".A student bravely replied, "Yes, He who created everything.""God created everything?" The professor asked."Yes, sir," the student replied.The professor responded,"If God created everything, then God created evil. Because evil exists, and according to the principle that our works define who we are, so we can assume God is evil. "The student became quiet and did not answer the professor's hypothetical.The professor felt victorious and proud that once again he has proved that religion is a myth.Another student raised his hand and said, "Professor, may I ask something?""Certainly," replied the professorThe student stood up and asked, "Professor, does cold exist?""What kind of question? Of course it exists. Have you never been cold? "Ask the other students snickered.The student replied,"In fact sir, cold does not exist. According to the laws of physics, what we consider cold is no heat. Temperature-460F is no heat at all. And all matter becomes inert and incapable of reaction at that temperature. We have created this word to describe the absence of heat. "The student continued, "Professor, does darkness exist?"The professor responded, "Of course there is darkness."The student replied,"Once again you are wrong, Pak.Gelap does not exist. Darkness is a state where no light. Light we can study, but not darkness. ""We can use Newton's prism to break white light into many colors and study the various wavelengths of each color.""But you can not measure darkness. How dark a certain space is measured by the amount of light in the room. Dark word used to describe the absence of light man. "Finally the young man asked, "Professor, does evil exist?"With undecided professor replied,"Of course, as has been said before. We see every day in newspapers and TV. Many cases of crime and violence among humans. Case-case is a manifestation of evil. "To this the student replied,"Once again you are wrong, sir. Crime does not exist. Evil is the absence of God. Such as cold or dark, evil man is the word used to describe the absence of God. ""God did not create evil. Evil is the result of the absence of God in human hearts. As arising from the lack of cold and hot dark arising from the absence of light. "
The professor sat down.Do you know who the student?Nothing other than he is Albert Einstein

Friday, April 29, 2011

Nutrient Content in The Eel

Did you know about the eel?
For some, the eel is a ridiculous animal even disgusting, but actually a lot of nutritional value in it.
Eels or commonly called welut (ed: Java), which has the Latin name Monopterus Albus Zuieuw (eel rice) has a lot of nutritional value. The nutrients contained in the eel has a protein equivalent to meat, and has the highest energy content than beef and chicken eggs.

Eels have a protein content by 18.4 g/100 g of meat, equivalent to 18.8 g/100g protein of beef, but higher than 12.8 g/100 g egg protein, and energy content contained in the eel is at 303 kkal/100gr meat. Eel energy value is much higher than 162 eggs and kkal/100g skinless beef kkal/100 207 gr.

Now look at the data above, the eels can be used as a cheap alternative source of nutrition, compared with the price of beef and egg prices. Eels are very suitable consumed at the age of infants and the elderly because of the value of high protein digestibility yanng. Eel it is equally delicious beef in the appeal. So, eels could be alteratif food is cheap and of high nutritional value.

Monday, April 18, 2011

National Examination in Indonesia

National Examination continues to get attention from year to year. This change in passing score is positive impact for the quality of national education. But besides that, also, there are some negative impacts. Psychological problems students one of them.
Although the national exam has been passed, all Indonesian students are still anxiously awaiting the announcement of the results of national exams in mid-May 2011. They hope to pass the National Exam and can continue their education into college bench. Seeing the psychological condition of the depressed participants with the National Examination, making many question whether the National Exam is required or not.
Viewed from the objective, the National Examination conducted to improve the quality of national education and distribution of quality education throughout Indonesia. During this time the quality of education in all areas in Indonesia are not the same. The quality of education in the island of Java, of course not the same as the quality of education in Guinea. With the implementation of the national examination will be known to the quality of education in each region, so the government can overcome the imbalance between areas of quality education with other regions. But in reality, local or central government slow to overcome inequality of education in this country. In remote areas, there are many educational infrastructure that is not feasible to be used as a place to carry out the learning process. Viewed from the side of the implementation of the national exam, many violations and fraud that occurred during the execution of the national exam. In many regions, many fraud cases found during the national exams take place as individual teachers who leaked the answers to the national exam, the spread of the answers before the implementation of the national exam performed. Various fraud that occurred in various regions, the touching sense of injustice for students in other areas who have struggled to pass the national exam in a way that honest. It's supposed to be perpetrators of fraud a national exam is given the criminal sanctions for the next year does not happen again cases of fraud in the implementation of the national exam. 

Wednesday, April 13, 2011

Improving Our World One LED Light at a Time

LED lights are a wonderful invention that has changed the way the world is lit. Not only are they long lasting, they have many environmental benefits. LED lights are four times more efficient than a regular incandescent light bulb and last 10 times as long. LED lights also use between 50 and 80 percent less energy than an incandescent bulb.

LED lights are considerably less expensive to operate, however are a little more expensive to purchase. LED home lighting requires only one third of the energy that an incandescent bulb will use. A single 18-watt LED light can replace a 75-watt incandescent and in the lifetime of the LED light, will save 570 kWh of energy. At a basic eight cents per kilowatt rate, that equals $45 dollars in energy bill savings.

By switching to low energy LED home lighting in your home, even one bulb will keep one half of a ton of carbon dioxide out of the atmosphere through the lifetime of the bulb instead of using incandescent bulbs. Switching also keeps sulfur oxide and nuclear waste out of the atmosphere as well, leading to a cleaner world and one that will last much longer. By simply switching, our environment could easily revitalize itself without having to deal with the excess carbon dioxide, sulfur oxide and nuclear waste emissions that are currently being released into the atmosphere every day. Even changing one lonely bulb in every home to LED home lighting would make a significant impact on the environment.

Saturday, April 9, 2011

Biodiesel as an Alternative Fuel

Biodiesel fuel is a fuel made from the oil of certain oilseed crops such as soybean, canola, palm kernel, coconut, sunflower, safflower, corn and a hundreds of other oil producing crops. The oil is extracted by the use of a press. The oil is then mixed in specific proportions with other agents which causes a chemical reaction. The results of this reaction are two products, biodiesel and soap.
After a final filtration, the biodiesel is ready for use. After curing, the glycerin soap which is produced as a by product can be used as is, or can have scented oils added before use.
Biodiesel fuel is not a new development; however it has gotten quite a lot of publicity lately. This is largely due to the rising cost of crude oil which puts a strain on the consumer's wallet at the gas pump. Biodiesel fuel is one alternative to relying on fossil fuels to operate our vehicles.

In 1895 Dr. Rudolph Diesel introduced the first diesel engine intended to run on vegetable oil. In 1900 he presented his engine at the World Exhibition in Paris. This diesel engine used peanut oil as fuel.
In 1912 Dr. Diesel predicted that in the future the use of vegetable oils as a fuel may be as important as the use of petroleum and coal was in his day. With the volatile nature of oil producing countries, and the ever surging cost of crude oil, interest in vegetable oils as fuel has been rekindled, so it seems Dr Diesel may have had a glimpse into the world of today.

How Do Fuel Cells Work

Fuel Cells are important emerging technologies today and have the potential to successfully replace the currently employed fossil fuels, towards a cleaner, greener, more efficient and more capable source of energy. They have the potential to generate power to run automobiles and hence replace the ubiquitous Internal Combustion engine and also provide for the running of stand-alone and portable power generation units which need mechanical input.

As a principle, Fuel Cells operate just like a battery complete with an anode, a cathode sandwiched between electrolytes along with a catalyst. However, unlike a battery, it does not lose its power and need recharging. As a matter of fact, it produces energy and keeps working until hydrogen is fed to it. It can also b stacked up and the total resulting current can be used to provide for the desired output.

In Operation, Hydrogen is made to pass over one electrode while oxygen is made to pass over the other produced electricity, water and heat in the process.

The Hydrogen gas, after having gone through a successful reform through the fuel-reformer, is fed to the "anode" of the fuel cell, while the oxygen enters through the cathode of the same apparatus. Due to the chemical reaction of the catalyst in the electrolyte, the hydrogen splits into an electron and a proton, both of which travel in different paths to the cathode. While the proton passes through the electrolyte, the electron and a bunch of more of its like pass together, forming an electric current in the process are tapped into for commercial use.

Climate Change - The Coming Crisis

While many contend that there are different reasons behind the changing of our climate, few can deny that our planet is going through a period of immense changes. While some may discredit the science, global warming is one of the main hypothesis for why our planet is heating up. In this article, we'll try to explain some of the science behind global warming so that you can understand the problem more clearly.
According to numerous scientific studies, our planet's surface temperature has increased by about 1 degree Fahrenheit within the last century. Most of this change has occurred in the past two decades, prompting the question: are our lifestyles accelerating this global change? The evidence definitely seems to point in that direction.

Many scientists point to the emission of greenhouse gases as one of the leading reasons that we are undergoing this global change. Carbon dioxide, methane, and nitrous oxide are some of the main compounds that we are releasing more and more, causing something known as the 'Greenhouse Effect'. This occurs due to the fact that these gases tend to trap heat, and when they are released into our upper atmosphere, they trap some of the heat energy that would normally be reflected by our earth's natural processes.