You have learned of atoms in your chemistry class, and how they are made up of protons, neutrons, and electrons. You were taught that electrons were really tiny. So tiny in fact that a droplet of water weighs about a billion, billion, billion times more than an electron. Electrons are so inconceivably small that some people think that it would be impossible to take their pictures
Each of us is a walking pharmacopoeia. At least that is what urinophiles or people who drink their own urine, think. They believe that we all carry a wonder drug in our bladders, and that is our urine.
It may not be very enticing for some, but there are those who actually drink their urine for medicinal or cosmetic purposes.
Washing our laundry is necessary, but we may not know how doing the laundry can harm the environment. A washing machine consumes lots of electricity and water to clean a load of clothing. On average, washers consume 40 gallons per load, making them one of the largest water users in the house. Dryers, on the other hand, consume about 1,000 kilowatt hours per household of energy annually. This energy contributes up to 2,224 pounds of carbon dioxide (CO2) in the atmosphere.
A typical 1000-megawatt thermal nuclear reactor produces about 30 tons of spent fuel rods in a year of operation. Add to that other incidental waste materials like clothes, filters, and many others. These waste can remain dangerous for tens of thousands of years.
We used to say that “to see is to believe.” These days, when almost anything can be made look photorealistic, that quaint expression lacks the sincerity it might have once had. Con you really trust the images you see on magazine covers, on television, and on the Web?
Light is so common that we often take it for granted. Yet without it, our world would be nothing but a cold, dark, lifeless matter. Light from the sun makes the earth warm enough for life. It also makes green plants grow. Plants are food for animals. Plants also give off oxygen that you breathe in the air. Dead plants provide fuel that we use for energy. Plants that died millions of years ago turned into coal and oil that people now use to make the heat and electricity.
It gave life to Dr. Frankenstein’s monster. It fueled Marty Mcfly’s time-machine in the movie, Back to the Future. The Romans believe that Jove, the King of the gods, used lightning to punish wrongdoers and change the outcome of wars. His favorite bird was said to carry his thunderbolts of wrath. Other cultures spoke of a thunderbird responsible for thunder and lightning. For many years, lightning has undoubtedly sparked our imagination.
In the world of technology today, the best known semiconductor is silicon. It is at the heart of any electronic device. Semiconductors are materials having electrical conductors and insulators. They behave like insulators when cold. But under higher temperatures or light with the addition of impurities, their conductivities increase dramatically, reaching levels that may approach those of metals.
Ever since man started burning wood or other organic matter to keep warm and to cook food, he has been using biomass energy. Biomass is a form of fuel derived directly or indirectly from residues, and dung. Today, we still surprise that experts are looking into ways on how to improve their energy efficiency.
In the world of science-fiction and fantasy, anything is possible. We have seen dinosaurs coming to life, cars becoming invisible, even humans having super powers. And who can ever forget portals? These are channels that allow characters to travel between two distant places in a split second. They are a common element of sci-fi movies.
If you’re a regular visitor of cyberspace, you have surely come across wikis. They have been popping up like mushrooms on the internet. A wiki is a type of server that allows people to enter and edit bits of text. These bits of text can be viewed and edited by anyone who visits a wiki.
It it’s a bright, clear day outside, you may reach for your sunglasses when you head for the door. And you probably do that without much thought. More than just stylish fashion accessory, sunglasses offer a lot of benefits for us. They provide protection from ultraviolet rays, intense light, and glare. All of these damage our eyes. Sunglasses can also eliminate specific frequencies of light.
When God showered the world with colors, peacocks were probably one of the first few to catch the whole spectra of colors. Peacocks are the world’s most elaborate and showy males, mustering their physical resources to wow potential mates with their enormous and gaudy, fan-like tail plumage. Behind the stunningly beautiful plumage of a peacock lies a complex structure that changes color with the angle of incident light. This optical phenomenon is known as iridescence (an optical phenomenon in which hue changes with the angle from which a surface is viewed).