The hard drive uses two important principles about the magnetic fields.
When we write data onto the hard drive Cit uses the law of electromagnetic
induction and some material is magnetic.
The hard drive uses two important principles about the magnetic
fields.
When we write data onto the hard drive it uses the law of
electromagnetic induction and some material is magnetic.
When we read data from the hard drive, it uses the Lenz's law.
How hard disk drive works:
Firstly we should know the two important part of the hard disk drive,
1. platters and media
We put all of the data onto the platters. They are inside of the hard
drive. There are several pieces of platter in the hard disk drive,
maybe three or four. They are made of special material. The material
must be strong and light. Because there are high rotation rates, when
the hard disk drive working. Traditionally, people often use aluminum
because it is a light material. But today, most platters are made from
material like glass or ceramic composite. These light, strong
materials have a very low thermal expansion, and compare to aluminum.
They can withstand higher forces. So the platters can run faster.
Older hard disk drive can only run at 3600 to 5200 rpm. Today's ones
can run7600 to 10000 rpm.
There is a layer of magnetic material on the surface of the platters.
Today a thin-film media is used here. Thin-film media is a microscopic
layer of pure metal bonded to the substrate surface through an interim
layer. Because the distance between head and platters is very small
(about 10 micro inches), but they can not touch with each other. So
the thin-film media is very flat and is coated with a protective layer
to help survive head crashing.
2. the arm and read and write head
The arm that holds the read/write heads is controlled by the mechanism
in the upper-left corner, and is able to move the heads from the hub
to the edge of the drive. The arm and its movement mechanism are
extremely light and fast. The arm on a typical hard-disk drive can
move from hub to edge and back up to 50 times per second. It is hard
to believe. But it is the truth.
Simply, The read and write head is a ferromagnetic core. It can
product a variety magnetic fields through a variety current to be able
to write data onto the media in ASC2. And also can product variety
current though inducing the variety magnetic field on the surface of
the platter to read data from the hard disk drive.
When students become critical thinkers they are analyzing and reflecting on what they are learning, therefor advancing their skills in problem solving. Problem solving requires one to be able to tackle the problem abstractly from many points of view. Often problems can have more than one solution so it is required to be able to analyze the information and be able to apply it in various ways. In “Idiot Nation” by Michael Moore, he argues that the lack of attention political leaders give to schools in America is one of the biggest factors hindering proper education .Moore puts the blame on leaders like Dwight D. Eisenhower and William Clark, as well as the people who vote for them. The problem is that “the political leaders...have decided it’s a bigger priority to build another bomber than educate our children.”(Moore 131)Moore believes leaders put more effort into military artillery rather than proper education .The solution to America’s problems is not more bombs or weapons. The real solution are the children, the future of America. Therefore it is vital that we turn them into impeccable problem solvers, to solve America’s problems not with weapons but with knowledge. Critical thinking does just that. In an article called “How Critical is Critical Thinking” by Shawn Ryan D he makes references to the various studies of critical thinking and its relation to problem solving.
Pull cable back to your side while pulling your shoulder back and pushing your chest slightly forward
A fathering text to Shakespeare’s Titus Andronicus, says T.W Baldwin, was a chapbook that was interested in the relationship between the Goths and the Romans (Kermode 1067), an idea that appears as an underlying theme throughout the play. In Titus Andronicus, the characters are often observed trying to discover which people, the Goths or the Romans, are more uncivilized. In the opening of the play, in response to the Roman’s inhuman sacrifice ritual, Chiron, son to the Gothic queen Tamora asks “Was never Scythia half so barbarous” (Shakespeare 1.1.131), claiming, though he is a Goth, his people were never so barbaric. Just moment after, Titus’s brother, Marcus, attempts to reason with him, saying “Thou art a Roman, be not barbarous” (1.1.378). He accuses Titus of being
The movie, The Breakfast Club, is a classic that displays five very different teenagers gathered in Saturday detention. Each teenager (Bender, Allison, Claire, Brian, and Andrew) has a different personality and behave in different ways which leads to clash between the characters.
The film The Breakfast Club illustrate, how a person’s identity can be demonstrate by he or she has experienced in life. John Bender is known to be the bully of the group, because his relationship with his abusive family. Leaving the fact that Bender has no one to help him deal with his conflict influencing him to put it out on other people. For example, when everyone was at the up top of library’s balcony Bender made an insult to Claire. “Oh Claire you’re just a princess, did daddy you bought that.” Andrew Clark have a problem that he can’t think of his self, that he has to please everyone including his father. Which demean him to feel guilty and have hatred on his father. For instance, Andrew told his story of how he put duct tape on one
To begin, the idea of masculinity and pride is highlighted throughout the entirety of the play. While it could be argued that Tamora displays female otherness and masculinity once she becomes the Empress of Rome, Tamora is largely made authoritative and masculine through her sexuality and infidelity. Those who honor or serve her specifically Aaron and even Saturninus, hono...
Gates entered Harvard University in 1973 and pursued his studies for the next year and a half. His life changed drastically in January 1975 when Paul Allen stumbled across a Popular Mechanics magazine with a cover t...
Well, Before anything else, here is a few names of components that need to be known to not be completely lost. The CPU(Central Processing Unit) (It processes everything from basic instructions to complex functions.) (Techterms.com). The Hard drive (the location of all the computer’s folders, files, and information, saved magnetically so even if turned off it’ll all stay saved). The RAM (Random Access Memory) (The more RAM your computer has, the more data can be loaded from the hard drive into the RAM, which can effectively speed up your computer.)(Techterms.com), The OS (Operating System) (just what it sounds like, this is the system that works the computer, as in Windows, Linux, and Apple OS.) The Graphics card (helps the CPU by processing the graphics portion of what the CPU has to process). The Disk Drive( this is the CD,DVD, or Blu-Ray driver that is installed to use CD’s DVD’s and or Blu-Ray disks.) The last major term to know is the Motherboard ...
change in the weight of the object when placed in the presence of an external
Carr, K. (1990). How Can We Teach Critical Thinking? ERIC Digest. Retrieved June 22, 2007,
Over the third quarter of physical science we have discussed heat, energy, electricity and magnetism. I have decided to do my paper over these four topics. If you have any questions please hold them till the end.
The last challenge that a beginning teacher may face is designing appropriate assessment to assess students’ critical reasoning. It is not easy to assess students’ critical reasoning as it is not just about having the knowledge of critical reasoning. Willingham (2007) states that “knowing that one should think critically is not the same as being to do” (p. 13). The teacher may be able teach the students critical reasoning and the students are aware of it but without the right assessment, it is hard to know if the students have actually acquired critical reasoning.
Gates not only shared dreams and hopes with himself nut with his partner Paul Allen there big dreams were about softwares and what impacts it would create to be able to impact people's lives to have a computers in every house, however he had to face many obstacles they stood in the way of his dreams in his private elementary school there wasn't enough money to provide for computers because back then they were very expensive and without computers how could he do what he was most interested in. Therefor Gates had a fundraiser was able to rent a year worth
With some weight attached to the handle bar, firmly grip the handle. To avoid having the exercise movements put too much pressure on your lower back, keep your knees slightly bent. Keep your upper body at a 45 degree angle. Lift the handle to your abdomen slowly, using your lats while lifting. Arch your back slightly to experience enough stress and contraction on your back. Stay in this position for a moment and lower the handle to the original position slowly. Perform four sets with ten repetitions.