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What is MB?  Scroll Down To Download!  The megabyte is a multiple of the unit byte for digital information. Its recommended unit symbol is MB. The unit prefix mega is a multiplier of 1000000 (106) in the International System of Units (SI).[1] Therefore, one megabyte is one million bytes of information. This definition has been incorporated into the International System of Quantities. However, in the computer and information technology fields, several other definitions are used that arose for historical reasons of convenience. A common usage has been to designate one megabyte as 1048576bytes (220 B), a measurement that conveniently expresses the binary multiples inherent in digital computer memory architectures. However, most standards bodies have deprecated this usage in favor of a set of binary prefixes,[2] in which this quantity is designated by the unit mebibyte (MiB). Less common is a convention that uses the megabyte to mean 1000×1024 (1024000) bytes. How many m...

What Is Watts? Scroll Down To Download! The watt (symbol: W) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second, and is used to quantify the rate of energy transfer. In SI base units, the watt is described as kg⋅m2⋅s−3. The watt is named after James Watt, an 18th-century Scottish inventor. The terms power and energy are frequently confused. Power is the rate at which energy is generated or consumed and hence is measured in units (e.g. watts) that represent energy per unit time. For example, when a light bulb with a power rating of 100W is turned on for one hour, the energy used is 100 watt hours (W·h), 0.1 kilowatt hour, or 360 kJ. This same amount of energy would light a 40-watt bulb for 2.5 hours, or a 50-watt bulb for 2 hours. Power stations are rated using units of power, typically megawatts or gigawatts (for example, the Three Gorges Dam in China, is rated at approximately 22 gigawatts). This reflects the...

What Is Volt? Scroll Down To Download! The volt (symbol: V) is the derived unit for electric potential, electric potential difference(voltage), and electromotive force. It is named after the Italian physicist Alessandro Volta (1745–1827). The "conventional" volt, V90, defined in 1987 by the 18th General Conference on Weights and Measures[3] and in use from 1990, is implemented using the Josephson effect for exact frequency-to-voltage conversion, combined with the caesium frequency standard. For the Josephson constant, KJ = 2e/h (where e is the elementary charge and h is the Planck constant), a "conventional" value KJ-90 = 0.4835979 GHz/μV was used for the purpose of defining the volt. As a consequence of the 2019 redefinition of SI base units, the Josephson constant was redefined in 2019 to have an exact value of KJ = 483597.84841698... GHz⋅V−1, which replaced the conventional value KJ-90. This standard is typically realized using a series-connected arr...

What is Teleportation?  Scroll Down To Download!  Can teleportation be possible? As of May 2020, teleportation has not yet been implemented in the real world. There is no known physical mechanism that would allow this. Frequently appearing scientific papers and media articles with the term teleportation typically report on so-called "quantum teleportation", a scheme for information transfer. What is a teleport machine? Teleportation, as it's commonly understood, suggests the movement of one object to another place, perhaps through the disassembly and reassembly of atoms or other similarly impossible means. This project teleports items by scanning them layer by layer and then grinding them away. Has teleportation been done? Quantum teleportation of data had been done before but with highly unreliable methods. On 26 February 2015, scientists at the University of Science and Technology of China in Hefei, led by Chao-yang Lu and Jian-Wei Pan carried out the...

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 ...

What Is Wormholes Scroll Down To Download  Wormholes are solutions to the Einstein field equations for gravity that act as "tunnels," connecting points in space-time in such a way that the trip between the points through the wormhole could take much less time than the trip through normal space. Wormholes contain two mouths, with a throat connecting the two. The mouths would most likely be spheroidal. The throat might be a straight stretch, but it could also wind around, taking a longer path than a more conventional route might require. Earlier this year, physicists proposed an answer in the form of “wormholes,” or gravitational tunnels. The group showed that by creating two entangled black holes, then pulling them apart, they formed a wormhole — essentially a “shortcut” through the universe — connecting the distant black holes. A wormhole is a theoretical passage through space-time that could create shortcuts for long journeys across the universe. Wormholes are pr...

What Is ion-propelled aircraft Scroll Down To Download  An ion-propelled aircraft or, shortened ionocraft, is an aircraft that uses electrohydrodynamics (EHD) to provide lift or thrust in the air without requiring combustion or moving parts. Current designs do not produce sufficient thrust for manned flight or useful loads. Ionocrafts work by using the last mechanism. A corona wire is strung at the top of the craft, and is charged with a very high voltage. ... The collector is a negatively charged plate or foil that attracts the positive ions. On their path to the collector, the ions will knock into the air molecules in their way. The phenomenon of ionic wind has been known about for centuries: by applying a voltage to a pair of electrodes, electrons are stripped off nearby air molecules, and the ionized air collides with neutral air molecules as it moves from one electrode to the other....

What Is Goldilocks Zone Scroll Down To Download  There is only one planet we know of so far that is teeming with life––Earth. And on our planet, water is a critical ingredient for life as we know it. While astronomers still don't know whether there's life on other planets, they narrow the search for potentially habitable worlds using a handful of criteria. Because our blueprint for life is Earth, astronomers look for planets with Earth-like characteristics, like liquid water. But a celestial object can only orbit so close (like Mercury) or so far (like Pluto) from its star before water on its surface boils away or freezes. The 'Goldilocks Zone,' or habitable zone, is the range of distance with the right temperatures for water to remain liquid. Discoveries in the Goldilocks Zone, like Earth-size planet Kepler-186f, are what scientists hope will lead us to water and one day life. Liquid water is essential for life as we know it. Where we find liquid water on Earth...

Niobium Information Scroll Down To Download Niobium Element Niobium, also known as columbium, is a chemical element with the symbol Nb (formerly Cb) and atomic number 41. Niobium is a light grey, crystalline, and ductile transition metal. Pure niobium has a hardness similar to that of pure titanium,[2][contradictory] and it has similar ductility to iron. Niobium oxidizes in the earth's atmosphere very slowly, hence its application in jewelry as a hypoallergenic alternative to nickel. Niobium is often found in the minerals pyrochlore and columbite, hence the former name "columbium". Its name comes from Greek mythology, specifically Niobe, who was the daughter of Tantalus, the namesake of tantalum. The name reflects the great similarity between the two elements in their physical and chemical properties, making them difficult to distinguish.[3] The English chemist Charles Hatchett reported a new element similar to tantalum in 1801 and named it columbium. In 1...

Ytterbium Information Scroll Down To Download Ytterbium Element Ytterbium is a chemical element with the symbol Yb and atomic number 70. It is the fourteenth and penultimate element in the lanthanide series, which is the basis of the relative stability of its +2 oxidation state. However, like the other lanthanides, its most common oxidation state is +3, as in its oxide, halides, and other compounds. In aqueous solution, like compounds of other late lanthanides, soluble ytterbium compounds form complexes with nine water molecules. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Ytterbium is the most volatile rare-earth metal. It is a soft, malleable silvery metal that will tarnish slightly when stored in air and therefore should be stored in vacuum or in an inert atmosphere when long storage time is required. It slowly oxidizes in air, forming Yb2O3; the metal is rea...

Mendelevium Information Scroll Down To Download Mendelevium Element Mendelevium is a synthetic element with the symbol Md (formerly Mv) and atomic number 101. A metallic radioactive transuranic element in the actinide series, it is the first element by atomic number that currently cannot be produced in macroscopic quantities through neutron bombardment of lighter elements. It is the third-to-last actinide and the ninth transuranic element. It can only be produced in particle accelerators by bombarding lighter elements with charged particles. A total of sixteen mendelevium isotopes are known, the most stable being 258Md with a half-life of 51 days; nevertheless, the shorter-lived 256Md (half-life 1.17 hours) is most commonly used in chemistry because it can be produced on a larger scale. Mendelevium was discovered by bombarding einsteinium with alpha particles in 1955, the same method still used to produce it today. It was named after Dmitri Mendeleev, father of the pe...

Magnesium sulfate Scroll down to download Magnesium sulfate is a magnesium salt having  sulfate  as the counterion. It has a role as an anticonvulsant, a cardiovascular drug, a  calcium  channel blocker, an anaesthetic, a tocolytic agent, an anti-arrhythmia drug and an analgesic. It is a magnesium salt and a metal sulfate. A small colorless crystal used as an anticonvulsant, a cathartic, and an electrolyte replenisher in the treatment of pre-eclampsia and eclampsia. It causes direct inhibition of action potentials in myometrial muscle cells. Excitation and contraction are uncoupled, which decreases the frequency and force of contractions. (From AMA Drug Evaluations Annual, 1992, p1083) Magnesium sulfate must be used with caution in patients suspected of or known to have renal Red. Magnesium sulfate should not be used in hepatic coma if there is a risk of renal failure. Parenteral magnesium salts should be used with caution in patients with myasthenia ...

Fiber Scroll down to download Fiber is a type of carbohydrate that the body can’t digest. Though most carbohydrates are broken down into sugar molecules, fiber cannot be broken down into sugar molecules, and instead it passes through the body undigested. Fiber helps regulate the body’s use of sugars, helping to keep hunger and blood sugar in check. Children and adults need at least 20 to 30 grams of fiber per day for good health, but most Americans get only about 15 grams a day. Great sources are whole fruits and vegetables, whole grains, and beans. High intake of dietary fiber has been linked to a lower risk of heart disease in a number of large studies that followed people for many years. (16) In a Harvard study of over 40,000 male health professionals, researchers found that a high total dietary fiber intake was linked to a 40 percent lower risk of coronary heart disease. (17) A related Harvard study of female nurses produced quite similar findings. (18) Higher fiber...

Calcium hypochlorite Scroll down to download Calcium hypochlorite  has the molecular formula of Ca(ClO) 2  and a molecular weight of 142.974   g/mol. Its CAS number is 7778-54-3. Its specific gravity is 1.21   g/cm 3 . When dissolved in water, it can provide nascent chlorine and oxygen to sterilize pool water or industrial wastewater. The structure of calcium chlorite, Ca(ClO 2 ) 2 , has been refined from X-ray powder diffraction data using the Rietveld method. The compound crystallizes in the orthorhombic space group  Ccca  ( Ccce ), with  Z   =   4. The structure is based on separate layers parallel to the  ac  plane, consisting of calcium cations that are coordinated by chlorite anions; the O atoms form almost ideal square antiprisms. Bleaching powder is actually a mixture of calcium hypochlorite (Ca(ClO) 2 ) and the basic chloride CaCl 2 , H 2 O with some...

Lawrencium Information     Scroll Down To Download Lawrencium Element Lawrencium is a synthetic chemical element with the symbol Lr (formerly Lw) and atomic number 103. It is named in honor of Ernest Lawrence, inventor of the cyclotron, a device that was used to discover many artificial radioactive elements. A radioactive metal, lawrencium is the eleventh transuranic element and is also the final member of the actinide series. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Thirteen isotopes of lawrencium are currently known; the most stable is 266Lr with a half-life of 11 hours, but the shorter-lived 260Lr (half-life 2.7 minutes) is most commonly used in chemistry because it can be produced on a larger scale. Chemistry experiments have confirmed that lawrencium behaves as a heavier homolog to lutetium in the periodic table, and is a trivalent element....