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How Do Solar Panels Work? Scroll Down To Download! Simply put, a solar panel works by allowing photons, or particles of light, to knock electrons free from atoms, generating a flow of electricity. Solar panels actually comprise many, smaller units called photovoltaic cells. (Photovoltaic simply means they convert sunlight into electricity.) Many cells linked together make up a solar panel. Each photovoltaic cell is basically a sandwich made up of two slices of semi-conducting material, usually silicon the same stuff used in microelectronics. To work, photovoltaic cells need to establish an electric field. Much like a magnetic field, which occurs due to opposite poles, an electric field occurs when opposite charges are separated. To get this field, manufacturers "dope" silicon with other materials, giving each slice of the sandwich a positive or negative electrical charge. Specifically, they seed phosphorous into the top layer of silicon, which adds extra electrons...

What Is Zener Diodes? Scroll Down To Download! Zener diodes are manufactured with a great variety of Zener voltages and some are even variable. Some Zener diodes have a sharp, highly doped p–n junction with a low Zener voltage, in which case the reverse conduction occurs due to electron quantum tunnelling in the short space between p and n regions − this is known as the Zener effect, after Clarence Zener. Diodes with a higher Zener voltage have a more gradual junction and their mode of operation also involves avalanche breakdown. Both breakdown types are present in Zener diodes with the Zener effect predominating at lower voltages and avalanche breakdown at higher voltages. Zener diodes are widely used in electronic equipment of all kinds and are one of the basic building blocks of electronic circuits. They are used to generate low-power stabilized supply rails from a higher voltage and to provide reference voltages for circuits, especially stabilized power supplies. They are ...

What Is Transformer? Scroll Down To Download! A transformer is a passive electrical device that transfers electrical energy from one electrical circuit to another, or multiple circuits. A varying current in any one coil of the transformer produces a varying magnetic flux in the transformer's core, which induces a varying electromotive force across any other coils wound around the same core. Electrical energy can be transferred between separate coils without a metallic (conductive) connection between the two circuits. Faraday's law of induction, discovered in 1831, describes the induced voltage effect in any coil due to a changing magnetic flux encircled by the coil. Transformers are most commonly used for increasing low AC voltages at high current (a step-up transformer) or decreasing high AC voltages at low current (a step-down transformer) in electric power applications, and for coupling the stages of signal processing circuits. Transformers can also be used for isola...

Role of Safety Equipment in Construction Hazards Scroll Down To Download!  🔻 # Operating at Heights Operating at heights is one of the most common practices in the construction projects. Having said that, it can also pose some severe threats to the safety and well-being of workers, especially when they are working at hundreds of feet above the ground. Employees falling from heights is one of the biggest reasons behind the occurrence of fatalities at construction sites. For that reason, the provision of adequate training and safety equipment becomes a necessity to ensure workers’ protection. Handling Heavy Objects Moving or handling heavy objects, either mechanically or manually, is considered to be one of the top construction hazards. The manual handling and movement of heavy materials must only be performed by well-equipped and well-trained employees. Building Collapse The sudden collapse of a civil structure often results in burying or seriously injuring individ...

what is the speed of internet in nasa?  Scroll Down To Download!  How fast is Internet in NASA? 91 gigabits per second Originally Answered: What is the speed of internet at Nasa ? The space organization's shadow network can transfer 91 gigabits per second, or 91,000 megabits per second. For comparison, the average broadband connection speed in the U.S. is 6.6 megabits per second - or more than 13,000 times slower. What Internet does NASA use? But for NASA, it's downright slow. While the rest of us send data across the public internet, the space agency uses a shadow network called ESnet, short for Energy Science Network, a set of private pipes that has demonstrated cross-country data transfers of 91 gigabits per second–the fastest of its type ever reported. Why NASA Internet is so fast? 91 gigabits per second?! I'm not good at math, but according to my calculations, that's a GAZILLION times faster than your current connection. NASA uses the network t...

how cold is space? Scroll Down To Download!  how cold is space? That’s a nonsense question. It’s only when you put a thing in space, like a rock, or an astronaut, that you can measure temperature. Remember there are three ways that heat can transfer: conduction, convection and radiation. Heat up one side of a metal bar, and the other side will get hot too; that’s conduction. Circulating air can transfer heat from one side of the room to another; that’s convection. But out in the vacuum of space, the only way heat can transfer is radiation. Photons of energy get absorbed by an object, warming it up. At the same time, photons are radiating away. If the object is absorbing more photons than it emits, it heats up. And if it emits more photons than it absorbs, it cools down. There is a theoretical point at which you can’t extract any more energy from an object, this minimum possible temperature is absolute zero. As we’ll see in a second, you can never get there. What ...

Why is a neodymium magnet so strong? Scroll Down To Download!  Neodymium magnets are considered strong because they resist demagnetization and have a high saturation magnetization. ... When a crystal has one easy axis of magnetization, the coercivity, or resistance to demagnetization, of the material increases because more energy is required to change the direction of magnetization. How long does a neodymium magnet last? 100 years How long will a neodymium magnet last? Neodymium magnets are permanent magnets, and lose a fraction of their performance every 100 years if maintained within their optimum working conditions. Why are neodymium magnets illegal? The swallowing of small magnets such as neodymium magnetic spheres can result in intestinal injury requiring surgery. ... The magnets are marketed to adults, with labels warning of their danger to children. As a result, Amazon and other retailers agreed to not sell the magnets. What magnet is stronger than neody...

Create a $50/Day Online Business Using This Unique 4 Step Strategy Scroll Down To Download 🔻 The very best thing I have learned over the years is to FOCUS on 1, yes 1 SINGLE method and don't stop until you perfect it. If you keep jumping around from ecom, to Twitter, physical products, email marketing, video channel marketing, etc. the list goes on and on, you'll find in a year, you are right back at square 1. HOWEVER - let's say you choose email marketing (my personal favorite) just do some numbers... After 1 year, you could have an business bringing in a conservative, easy, $50/day... Month 1 - you set up your landing page, list and email sequence and begin marketing Every day, you drive 50 visitors to your landing page (either free traffic like blogging, Facebook posts, Twitter posts, YT vids, etc.) OR paid traffic, approx. $0.40/click * 50 clicks/day = $20/day in ad spend If your opt in page converts at say 35% (pretty average), you'll get approx. 1...

Chromium Information Scroll Down To Download Chromium Element Chromium is a chemical element with the symbol Cr and atomic number 24. It is the first element in group 6. It is a steely-grey, lustrous, hard and brittle transition metal.[4] Chromium is the main additive in stainless steel, to which it adds anti-corrosive properties. Chromium is also highly valued as a metal that is able to be highly polished while resisting tarnishing. Polished chromium reflects almost 70% of the visible spectrum, with almost 90% of infrared light being reflected.[5] The name of the element is derived from the Greek word χρ ῶ μα, chrōma, meaning color,[6] because many chromium compounds are intensely colored. Chromium is a relatively abundant element in Earth’s crust; the free metal is never found in nature. Most ores consist of the mineral chromite, the ideal formula of which is FeCr2O4. It is widely dispersed in natural deposits, which are usually contaminated with oxygen, magnesium, a...

Silicon Information Scroll Down To Download Silicon Element Silicon is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, and lead are below it. It is relatively unreactive. Because of its high chemical affinity for oxygen, it was not until 1823 that Jöns Jakob Berzelius was first able to prepare it and characterize it in pure form. Its oxides form a family of anions known as silicates. Its melting and boiling points of 1414 °C and 3265 °C respectively are the second-highest among all the metalloids and nonmetals, being only surpassed by boron. Silicon is the eighth most common element in the universe by mass, but very rarely occurs as the pure element in the Earth's crust. It is most widely distributed in dusts, sands, planetoids, and planets as v...

Molybdenum Information Scroll Down To Download Molybdenum Element Molybdenum is a chemical element with the symbol Mo and atomic number 42. The name is from Neo-Latin molybdaenum, from Ancient Greek Μόλυβδος molybdos, meaning lead, since its ores were confused with lead ores.[6] Molybdenum minerals have been known throughout history, but the element was discovered (in the sense of differentiating it as a new entity from the mineral salts of other metals) in 1778 by Carl Wilhelm Scheele. The metal was first isolated in 1781 by Peter Jacob Hjelm.[7] Molybdenum does not occur naturally as a free metal on Earth; it is found only in various oxidation states in minerals. The free element, a silvery metal with a gray cast, has the sixth-highest melting point of any element. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. Most mo...

Samarium Information Scroll Down To Download Samarium Element Samarium is a chemical element with the symbol Sm and atomic number 62. It is a moderately hard silvery metal that slowly oxidizes in air. Being a typical member of the lanthanide series, samarium usually assumes the oxidation state +3. Compounds of samarium(II) are also known, most notably the monoxide SmO, monochalcogenides SmS, SmSe and SmTe, as well as samarium(II) iodide. The last compound is a common reducing agent in chemical synthesis. Samarium has no significant biological role but is only slightly toxic. Samarium is a moderately soft metal, silvery white in colour. It is relatively stable in air, slowly oxidizing to Sm2O3. It rapidly dissolves in diluted acids—except hydrofluoric acid (HF), in which it is stable because of formation of a protective trifluoride (SmF3) layer. Samarium is a moderately strong paramagnet above 109 K (−164 °C, or −263 °F). Below 109 K, antiferromagnetic order develops for t...