Imagine that Earth and acirc and 128 and 153s magnetic field was fixed in place and the polarity didn't reverse. What effect would this have on our observations of seafloor basalts?

What device uses magnetism to store information?

Magnetic storage devices are based upon the principal of electromagnetism. As an electric current passes through a conductor, a magnetic field is created around that conductor. The magnetic field rotates clockwise or anti-clockwise around the conductor depending on which direction the electrons flow through the conductor. When a conductor is connected to a DC battery, the electrons flow from the negative terminal to the positive terminal which is the complete opposite of how we imagine they travel. However, this imagined direction gives us a simple but literal "rule of thumb" to determine the actual direction of the magnetic field. If we were to grasp the conductor in our right hand such that our thumb pointed in the imagined direction the electrons were flowing (towards the negative terminal), then our fingers wrapped around the conductor would tell use the direction the magnetic field was travelling. If we were to use the true direction of electrons (negative to positive), then we would use our left hand with our thumb pointing towards the positive terminal. In order to switch the rotation of the magnetic field from clockwise to anti-clockwise, we need to switch the direction the electrons travel through the conductor. Put simply, if we swap the ends of the conductor, the electrons will travel in the opposing direction and thus switch the rotation of magnetic field. Now, the really interesting part about electromagnetism is not that an electric current can create a magnetic field around a conductor (although that is quite interesting in and of itself). No, the really interesting part is that when we bring a conductor into the proximity of a magnetic field (or indeed bring a magnetic field into the proximity of a conductor) we create an electric charge within the conductor! The polarity of the electric charge (that is, the direction in which the electrons travel through the conductor) depends upon the motion of the magnetic field relative to the conductor. As they move closer, we get one polarity, while pulling away we get the other. Now , take a moment to let all this sink in, it's a vital life skill! Not only can we use electricity to create a magnetic field but we can use a magnetic field to create electricity! More importantly, the polarity of the electricity dictates the polarity of the magnetic field, and vice versa. Electromagnetism is not just a big fancy Greek word: electricity and magnetism are naturally symbiotic! In order to use electromagnetism as a means of storing data, we first need a medium that can physically record these magnetic fields. Magnetic tape is an obvious example. This is really nothing more than a non-magnetic "substrate", typically Mylar, coated in a layer of magnetic material primarily composed of iron oxide. As the tape passes through the magnetic field generated from electricity, the iron oxide particles re-align themselves according to the relative strength and polarity of the field and will maintain that state until we apply another magnetic field to it. Since the tape is moving through the magnetic field at a constant speed, it will faithfully record every change that occurs to the magnetic field. Once we've completed a recording, we will naturally want to replay it. To do so we simply reverse the process. As the tape passes over the conductor, the magnetic fields upon the tape reproduce the electric current that was used to create the magnetic fields in the first place. As the magnetic field changes in strength and polarity, so the electric current changes to suit. Thus we can faithfully reproduce every nuance of the original electric current. Well, not exactly, there's always a little lost along the way, but its close enough as makes no practical difference. an obvious practical application is that we can use electromagnetism to make an analog recording, such as when recording a vocal performance. A microphone converts the sound waves produced by the performer into an oscillating electric current that is analogous to the original sound wave. That electric current is then used to generate oscillating magnetic fields which can then be recorded onto magnetic tape. When the recording is complete, we can replay the tape to recreate the electric currents which can then be passed to a speaker which converts the electrical energy back into sound energy. This is an over-simplification. However, if we can use electricity and magnetism to record and reproduce something as complex as an analog sound wave with a reasonable degree of accuracy, then recording digital information should be a walk in the park. Unfortunately it is not, but it's also not overly difficult. Whereas analog recordings try to faithfully reproduce all the subtle nuances of a sound wave, digital recording are only interested in reproducing sequences of 1s and 0s. Electromagnetism involves negatively and positively polarised electrons, so it seems obvious that we should use negative polarity to represent 0s and positive polarity to represent 1s. If only it were that simple... The problem with this method is that we cannot record long sequences of consecutive 0s or 1s because there's simply no way to differentiate one bit from the next in the absence of a magnetic flux reversal. That is; a transition from 0 to 1 or vice versa. If we write 100 zeroes, we want to ensure that when we read it back we get exactly 100 zeroes, not 101, not 99, but exactly 100. To get around this we use the transitions themselves to denote the 1s and 0s, never the polarity. In this way we are no longer concerned with the polarity, only in whether or not a flux transition has occurred (regardless of which direction). Now, if we say that a flux transition now represents a 1, then we can guarantee that a long sequence of 1s will be represented by an equally long sequence of alternating flux transitions. That's half the problem solved at a stroke. That just leaves the zeroes which we must denote with a non-transition. To resolve that problem we simply insert periodic clock transitions. That is, if we insert a clock transition in front of every bit, then a 1 becomes two consecutive transitions while a 0 becomes a transition followed by a non-transition. Problem solved! Actually, no, it isn't. The problem with this encoding is that the minimum run of non-transitions is 0 while the maximum is 1. Technically this is a variant of Run Length Limited encoding known as RLL 0,1, but is more commonly known as Frequency Modulation (FM) encoding. We haven't used FM encoding since the 70s and for good reason. There's inevitably going to be a lot of transitions, at least one in every data bit boundary, and every transition slows down reading and writing and reduces overall capacity. If we can reduce the number of clock transitions, we can not only increase read and write speed, we can also increase capacity by packing more data bits into the same space. We can easily achieve that by saying that a clock transition should only be inserted when a 0 immediately follows a 0. If we then say that a 1 is always a non-transition followed by a transition while a 0 following a 1 is two non-transitions, then a 0 following a 0 becomes a clock transition followed by a non-transition. In this way the minimum run of non-transitions is 1 and the maximum is 3 (technically known as RLL 1,3). In so doing we've effectively halved the number of transitions, doubled the clock frequency and thus doubled the capacity. Virtually every floppy disk and hard-drive up until fairly recently used RLL 1,3, more commonly known as Modified Frequency Modulation (MFM) encoding. Today we predominantly use RLL 2,7 encoding although this has proved unreliable with today's highest capacity drives which now predominantly use RLL 1,7 encoding. Both offer improved data density and speed over MFM.

Which law gives the direction of magnetic field due to a current carrying conductor?

The right hand rule. If you were to place your right hand around the conductor, with the thumb pointing in the direction of current flow, your fingers which are wrapped around the conductor will point in the direction of magnetic flux. Said another way, if you are looking at the end of the conductor and current is flowing towards you, then magnetic flux will be counter-clockwise.

What is anything that you can imagine a boundary being around?

anything that you can imagine a boundary being around

The earth blank field reverses from time to time?

Magnetic . This has been charted and monitored since, I would imagine the times of such pioneer physicists as Newton and Halley. Exactly how and why these fluxions ( as Newton called- them, later applying the term to Calculus) occur is not precisely understood. Nature holds many arcane secrets.

Why does a compass needle always point to magetic north?

The simple answer is that the magnetized needle is being attracted by the North Magnetic Pole (which is close to, but not the same as the geographic North Pole).However, the colored part of the needle is not actually drawn to the North, although that would be the result of unlike charges being drawn together. The actual effect is that the needle aligns itself with the parallel lines of magnetism connecting the North and South magnetic poles, so that it lines up North and South, its northern end pointed north and its southern end pointed south.The Earth's magnetic field is generated by the movement of its iron core in relation to the crust.No matter where you stand on Earth, you can hold a compass in your hand and it will point toward the North Pole. What an unbelievably neat and amazing thing! Imagine that you are in the middle of the ocean, and you are looking all around you in every direction and all you can see is water, and it is overcast so you cannot see the sun... How in the world would you know which way to go unless you had a compass to tell you which way is "up"? Long before GPS satellites and other high-tech navigational aids, the compass gave humans an easy and inexpensive way to orient themselves.But what makes a compass work the way it does? And why is it useful for detecting small magnetic fields, as we saw in How Electromagnets Work? In this article, we will answer all of these questions, and we'll also see how to create a compass from scratch!A compass is an extremely simple device. A magnetic compass (as opposed to a gyroscopic compass) consists of a small, lightweight magnet balanced on a nearly frictionless pivot point. The magnet is generally called a needle. One end of the needle is often marked "N," for north, or colored in some way to indicate that it points toward north. On the surface, that's all there is to a compass.The reason why a compass works is more interesting. It turns out that you can think of the Earth as having a gigantic bar magnet buried inside. In order for the north end of the compass to point toward the North Pole, you have to assume that the buried bar magnet has its south end at the North Pole, as shown in the diagram at the right. If you think of the world this way, then you can see that the normal "opposites attract" rule of magnets would cause the north end of the compass needle to point toward the south end of the buried bar magnet. So the compass points toward the North Pole.To be completely accurate, the bar magnet does not run exactly along the Earth's rotational axis. It is skewed slightly off center. This skew is called the declination, and most good maps indicate what the declination is in different areas (since it changes a little depending on where you are on the planet).The magnetic field of the Earth is fairly weak on the surface. After all, the planet Earth is almost 8,000 miles in diameter, so the magnetic field has to travel a long way to affect your compass. That is why a compass needs to have a lightweight magnet and a frictionless bearing. Otherwise, there just isn't enough strength in the Earth's magnetic field to turn the needle.The "big bar magnet buried in the core" analogy works to explain why the Earth has a magnetic field, but obviously that is not what is really happening. So what is really happening?No one knows for sure, but there is a working theory currently making the rounds. As seen on the above, the Earth's core is thought to consist largely of molten iron (red). But at the very core, the pressure is so great that this superhot iron crystallizes into a solid. Convection caused by heat radiating from the core, along with the rotation of the Earth, causes the liquid iron to move in a rotational pattern. It is believed that these rotational forces in the liquid iron layer lead to weak magnetic forces around the axis of spin.It turns out that because the Earth's magnetic field is so weak, a compass is nothing but a detector for very slight magnetic fields created by anything. That is why we can use a compass to detect the small magnetic field produced by a wire carrying a currentThe Core of our earth is molten iron, and it's spinning really friggen fast. That spin of the iron creates a large electro-magnetic field. Similar to a small bar magnet, it has two poles. The needle in the compas will be attracted to the pull of the northpoleansw2. your compass needle just aligns itself with the lines of magnetic force in your vicinity. Which in turn are influenced by the position of the poles.because of the poles magnetic fieldA compass needle aligns itself to the earth's magnetic field. The direction of the earth's magnetic extends from the earth's Magnetic South to its Magnetic North. Remember, the terms 'Magnetic North' and 'Magnetic South' refer to LOCATIONS in the Arctic and Antarctic, respectively, and not to the magnetic polarities at these locations. Because 'unlike poles attract', this means that the polarity of Magnetic North is a south pole, thus attracting the north (coloured) pole of a compass needle.The iron core of the Earth acts like a giant bar magnet buried in the Earth.Since that giant bar magnet is pointing South, opposites attract and the magnetized needle points North.

Imagine that Earth and acirc and 128 and 153s magnetic field was fixed in place and the polarity didn't reverse. What effect would this have on our observations of seafloor basalts?

Add your answer:

What device uses magnetism to store information?

Which law gives the direction of magnetic field due to a current carrying conductor?

What is anything that you can imagine a boundary being around?

The earth blank field reverses from time to time?

Why does a compass needle always point to magetic north?

Imagine a planet with no magnetic field. Such a planet probably does not have a .?

What is the polarity of butane?

What is the polarity and molecular shape of HCF?

Imagine a planet with no magnetic field Such a planet probably does not have a?

What is dot polarity in 3 phase transformer?

Identify two different ways that a single atom might produce a magnetic field?

What is meaning of horizontal component of earth's magnetic field?

Can a magnetic field affect the performance of electrical circuits?

What if water molecules used nonpolar convelant bonds?

What are the best imagine Nintendo DS games?

What are all the imagine ds games?

How do you write imagine in Hindi?

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