fly2school

How do Magnets work? The north pole of one magnet attracts the south pole of another magnet, while the north pole of one magnet repels the other magnet's North Pole.   A magnet creates an invisible area of magnetism all around it called a magnetic field. Every magnet has both a North and a South Pole. When you place the North Pole of one magnet near the South Pole of another magnet, they are attracted to one another. When you place like poles of two magnets near each other they will repel each other. "Like poles repel, unlike poles attract". Magnets don't mind the cold, some magnets perform better when the temperature drops. That's because the atoms that comprise magnets vibrate more slowly and less randomly when cold. The result is a better alignment of the atoms that generates the magnetic field, boosting its strength. It is also possible for a permanent magnet to lose its magnetism. It happens by demagnetizing magnetic field: permanent magnets ...

Hydraulic system Hydraulic systems normally work by using pressurized fluid to power an engine. These hydraulic presses put pressure on a small amount of fluid in order to generate a large amount of power. That pressure forces it against a piston on the other side of the container. Hydraulic systems function and perform tasks by using a fluid that is pressurized. The power of liquid fuel in hydraulics is significant and as a result, hydraulic are commonly used in heavy equipment. The major function of a hydraulic fluid is to provide energy transmission through the system which enables work and motion to be accomplished. Hydraulic fluids are also responsible for lubrication, heat transfer and contamination control. The science behind hydraulics is called Pascal's principle. Essentially, because the liquid in the pipe is in-compressible, the pressure must stay constant all the way through it, even while pushing it hard at one end or the other. Thus, pressure is defined...

Why does Sunset in Mars appear to be blue? On Planet Mars, the sky is red during the day and the sunset is blue. The reason for this is that the dust particles always make a blue halo around the sun on Mars, but the halo is only easy to see when the light passes through all the dust while coming over the horizon. The normal hue of the sky during the daytime is a pinkish-red; however, in the vicinity of the setting or rising sun it is blue. This is the exact opposite of the situation of what happens on Earth. However, during the day the sky is a yellow-brown color. On Mars, Rayleigh scattering is usually a very small effect. The light from the Sun scatters based on what’s in the atmosphere. Sunlight comprises light of many different wavelengths, and molecules and dust particles only interact with specific waves. The scattering of light by these particles is key to the color that we see. At sunset light has a longer distance to travel within the atmosphere, so it s...

How do Aircraft tire take so much pressure while landing? Large aircraft tires are filled with nitrogen and not air. Air is a combination of gasses that at low atmospheric temperatures and pressure can turn to ice inside the tires or under high temperatures and pressures even explode. If the pressure is found to be between 95 and 100 percent of operating pressure, service the tire to 105 percent, this is considered normal pressure loss. If it is between 90 and 95 percent, the pressure loss is no longer normal. Service the tire to 105 percent, make a log book entry, and recheck in 24 hours There are different types of tires which are used by Aircraft's, they are Radial ply tires, Bias ply tires, Tube-type tires, Tubeless tires. “It is almost impossible to blow out a tire by over inflating it,” Bartholomew says. “In fact, in cases where tires have been over-inflated, the wheel actually fails before the tire.” With the amount of nitrogen filled in the tire, the airc...

What is Corrosion? Corrosion is the process of collapsing of materials as a result of electro chemical, chemical or other reactions. In this, rusting is a part of corrosion and is a chemical process which results in the formation of red or orange coating, which is one the surface of metals. Metal corrodes when it reacts with many other substances such as hydrogen, oxygen or even bacteria. It can also happen when metals like steel are placed under too much pressure which causes the material to crack. The types of Corrosion are: Uniform, or General attack, Galvanic, or two-metal corrosion, Crevice corrosion, Pitting, Inter-granular corrosion, Elective leaching, or parting, Erosion corrosion, and Stress corrosion. When metals are damaged, they are easily oxidized and hence lose electrons to oxygen in air and water, thus and oxide is formed in the metals when oxygen is reduced. Forrest, Roetheli and brown in an instructive research proved that corrosion occurs throug...

Decibel Range A decibel (dB) is a unit of measurement for sound. A-weighted decibels, abbreviated dBA, are an expression of the relative loudness of sounds in air which is perceived by our ears. It is a unit of measurement used to express the ratio of value of power or filed quantity to another, on a logarithmic scale. This power is called the power level or field level. It can be used to change is value or absolute value, which varies. The normal conversation is about 60 dB, a lawn mower is about 90 dB, and a loud rock concert is about 120 dB. Generally any sound above 85 are harmful, and it depends on how long one is exposed to the sound and if the usage of hearing protection like,   earplugs or earmuffs are being used. (NIOSH) - The National Institute of Occupational Safety,states that for a 115 dB sound, the limit is 28 seconds of exposure. The safe noise level of 70 dB over 24 hours will damage ones hearing, says the Environmental Protection Agency (EPA). To...

How do Lenses work? Concave Lens vs Convex Lens Lenses are understood to be a curved and transparent piece of glass or plastic, which focuses and refracts light rays in a particular way. The curvature of the given object makes sure that the extent to the which light is bent and in which direction. It is mostly used in telescopes, spectacles and microscopes. Depending on the shape, these lenses can be grouped as a Concave lens or Convex lens. Concave Lenses represent the type of lenses which are thin at the center than the borders. The shape of a concave lens is round inward which bends the beams outward, causing divergence of the rays of light falling on it, so it is known as a diverging lens. Hence, makes the objects look smaller and farther than they really are and the image formed is virtual, diminished and upright. Convex Lenses are the lenses which are big at the center than the edges. The curve of the lens is outward, and as the light beams pass...