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Magnetism in the 21st Century
Transcript of Magnetism in the 21st Century
Magnetism is the force of attraction to iron, which can also be involved with electric currents that cause fields of force.
Today, magnets have many practical reasons for day-to-day life, such as doorbells, train tracks, and junkyard magnets. Magnets Electromagnets North poles bar magnets Compass needles the Earth X-rays electric coils South poles Bullet Trains Junkyard magnets N S electromagnetic waves Doorbells Ding! N Category 1: Medicine The X-ray Machine
In the category of medicine, I chose the x-ray machine. A reason why I chose this is because x-rays are a form of electromagnetic energy. When a person breaks or fractures a bone, the x-ray machine can determine what the damage is for that person. Also, the x-ray machine helps doctors to see if there is a lodged object in someone's body. Sure helps with medicine and diagnosing, right? Category 2: Navigation The compass
Next in our trip to discover magnets in our day-to-day lives is the old-fashioned compass. The compass is a tool allowing us to find the relative direction to Earth's magnetic poles. A compass always points North, magnetic North that is, which is actually the geographic South pole. Ironic! Category 3: Astronomy The Gravity and Extreme Magnetism Small Explorer Astronomy has many magnets in disguise, and this device is something that is used to detect cosmic electromagnetic waves traveling through sapce. It is called the Gravity Extreme and Magnetism Small Explorer, or GEMS. The GEMS can detect polarization in emag waves, as well as being able to see where electromagnetic waves are originated from. Also, the GEMS will use x-ray mirrors to detect the waves. The GEMS will be 100 times more sensitive than current visible light or x-ray observatories. The technology GEMS will be equiped with might be able to detect the source of the emag waves, and might be able to see if it is something like a balck hole. The GEMS will be launched at the earliest in 2014 for a two-year mission. Category 4: Electronics Computers/ Computer Discs
Computers are a huge part in our everyday lives. Storage disks we use to put data on actually have a magnetic coating on them that allows small magnetic fields to align in a certain pattern, allowing us to store data. Also, computers use magnets, not only computer disks. Inside the computer machine, electrical currents flow through metal, causing some electromagnetic force inside the computer machine. Category 5: Toys Magnetix/Magnext
Finally, last but not least is the toys section. Magnets used in toys can be dangerous if swallowd. Magnetix was made out of small steel bars that connected to small magnetic balls, that could eventually make enormous structures. The line of Magnetix was eventually shut down because small kids were beginning to swallow the bars and get poisoned. Now, Magnetix had been retired and revised to make Magnext, a reinforced version to be safer for young children. Magnetix were very fun to play with as well.