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May 20, 2019

Drawing On A Grain Of Sand

Sand is a naturally occurring granular material composed of finely divided rock and mineral particles. The composition of sand can be very versatile, depending on the local rock sources and conditions, but the most common constituent of sand in inland continental settings and non-tropical coastal settings is silica (silicon dioxide, or SiO2), usually in the form of quartz.

The second most common kind of sand is calcium carbonate, an example can be aragonite, which has mostly been created, over the past half billion years, by various forms of life, like coral and shellfish. It is, for example, the primary form of sand apparent in areas where reefs have dominated the ecosystem for millions of years like the Caribbean.

The study of individual grains can reveal much historical information as to the origin and kind of transport of the grain. Quartz sand that is recently weathered from granite or gneiss quartz crystals will be angular. It is called grus in geology or sharp sand in the building trade where it is preferred for concrete, and in gardening where it is used as a soil amendment to loosen clay soils. Sand that is transported long distances by water or wind will be rounded, with characteristic abrasion patterns on the grain surface. Desert sand is typically rounded.

People who collect sand as a hobby are known as arenophiles. Organisms that thrive in sandy environments are psammophiles.

Technology in the Classroom

Laptops, e-readers, smart phones and ipads are everywhere, even in the classrooms. From homeworm to class work, computers and their mobile counterparts have changed the way students learn and how classes are taught. Every year more technology comes into the classroom, and for better or worse, it’s here to say.
Technology in the Classroom
Via: Online Colleges and Universities

Technology is the usage and knowledge of tools, techniques, crafts, systems or methods of organization. The word technology comes from the Greek technología (τεχνολογία) — téchnē (τέχνη), an ‘art’, ‘skill’ or ‘craft’ and -logía (-λογία), the study of something, or the branch of knowledge of a discipline.The term can either be applied generally or to specific areas: examples include construction technology, medical technology, or state-of-the-art technology or high technology. Technologies can also be exemplified in a material product, for example an object can be termed state of the art.

Technologies significantly affect human as well as other animal species’ ability to control and adapt to their natural environments. The human species’ use of technology began with the conversion of natural resources into simple tools. The prehistorical discovery of the ability to control fire increased the available sources of food and the invention of the wheel helped humans in travelling in and controlling their environment. Recent technological developments, including the printing press, the telephone, and the Internet, have lessened physical barriers to communication and allowed humans to interact freely on a global scale. However, not all technology has been used for peaceful purposes; the development of weapons of ever-increasing destructive power has progressed throughout history, from clubs to nuclear weapons.

Unique Robot Computer Case

Boys like toys and there is no doubt about that. What are some of the favorite toys that boys like? Well, electronics in general and computers in particular and then, of course, there are robots. Not to forget to mention toy guns and fake ammunition. Now, what is the best game that boys like? Well, construction games, of course. Just consider the popularity of Lego and constructions toys. Also, we know that even when they grow up, men tend to be like boys. So, what is the result of all this? Take a look at the picture below and judge for yourself.

You will see how a man has made use of all his skills and talents to create in real life every boy’s dream come true. Except that it is likely to be extremely dangerous, of course. It is a computer modded into a killing robot, after all.

Complicated Mechanisms Explained

Students of Mechanical Physics can rejoice. Take a look at the pictures below and feel the frown lines on your forehead crease away and feel the beginnings of a smile on your lips. One of the biggest complications faced by physics students is the understanding, explaining and application of complex mechanisms. A lot of time and energy that could have been fruitfully spent elsewhere goes in the quest for mastering elusive mechanisms. The pictures below do this task for you and help you understand complex mechanisms extremely easily. The way they are explained also make it extremely easy to memorize them as well as apply them. How? By animating them, of course!

As you look at the pictures below, you will find the radial engine, the steam engine, the sewing machine, the Maltese Cross mechanism, the manual transmission mechanism, the constant velocity joint, the torpedo boat destroyer system and the rotary engine animated for simple understanding.

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