History of electromagnetism Lodestone , a natural magnet , attracting iron nails. Ancient humans discovered the property of magnetism from lodestone. An illustration from Gilbert’s De Magnete showing one of the earliest methods of making a magnet. A blacksmith holds a piece of red-hot iron in a north-south direction and hammers it as it cools. The magnetic field of the Earth aligns the domains, leaving the iron a weak magnet. Drawing of a medical treatment using magnetic brushes. Charles Jacque , France. Magnetism was first discovered in the ancient world, when people noticed that lodestones , naturally magnetized pieces of the mineral magnetite , could attract iron. By the 12th century the Chinese were known to use the lodestone compass for navigation.
Introduction What is ‘Magnetic Therapy’? Put simply, it is the use of magnets to treat or ease the symptoms of various diseases and conditions, including pain. There are excellent articles on the Internet explaining and debunking magnetic therapy and we will provide links to some of these at the end of this essay. However we don’t wish to just restate this information, so the main focus of this essay will be to explore some ‘what if’ scenarios.
What if magnetic therapy really did work the way magnetic therapy proponents say it does? How would our bodies really react?
Speed dating (noun): an event at which each participant converses individually with all the prospective partners for a few minutes in order to select those with whom dates are desired.
However, we need to understand, design and evaluate experiences for varying customer contexts, needs, goals and attitudes. The Role of Personas To scale an end-to-end user experience mindset and make an impact across an enterprise, most in-house design leaders must develop passionate change agents equipped with understanding of customer needs. We share Voice of Customer insights to focus prioritization and design on the needs of real people.
However, it is not practical to design experiences to satisfy the needs and idiosyncrasies of tens of thousands of individuals in our enterprise. Personas are an effective tool we use to embed a human-centered mindset in a way that scales, to get results and deliver sustainable business value. Personas enable our design teams and business stakeholders with human reference points.
This ensures we consider different perspectives as we design experiences for people with varied needs and goals, and in differing contexts. Referring to personas is one way to prevent decision-making based primarily on personal self-reference or assumptions.
Posted on July 12, by The Physicist Physicist: This is exciting, because it demonstrates the feasibility of easy cheap , high-fidelity, long-distance quantum entanglement, which is the key to all quantum communication. Micius is the first shaky pillar of a global-scale quantum infrastructure. Entanglement is basically a combination of correlation and superposition. The difference between a bit and a qubit is that a bit is either 1 or 0 while a qubit is simultaneously 1 and 0.
Magnet Speed Dating. magnet speed dating Perspective: Speed Networking for Scientists. Kelly had just read an article on speed dating in New His facility provides magnetic resonance imaging on small (Speed dating is) a fast and comfortable way to meet people. It helps enlarge my social contacts.
By Lenz’s law , any change in the magnetic field would be immediately opposed by currents, so the flux through a given volume of fluid could not change. As the fluid moved, the magnetic field would go with it. The theorem describing this effect is called the frozen-in-field theorem. Even in a fluid with a finite conductivity, new field is generated by stretching field lines as the fluid moves in ways that deform it.
This process could go on generating new field indefinitely, were it not that as the magnetic field increases in strength, it resists fluid motion. The temperature increases towards the center of the Earth, and the higher temperature of the fluid lower down makes it buoyant. This buoyancy is enhanced by chemical separation: As the core cools, some of the molten iron solidifies and is plated to the inner core.
November 11, The Good Detailed overview of the most popular dating sites and what it takes to meet women from them. Based on real world evidence that the company has collected from thousands of messages. Includes a piece of software that helps automate the process so that you’ll get faster results with less effort.
This is an adventure game with virtual dating aspect. The story takes place in the opening day of the park in town. You find yourself transported to a strange world. You need to find the truth and find the way back to your life; you also need to regain the hearts of others. There are eight possible endings of this game. Wonderland Days Sim Date You can play this game no matter what age you are as this dating simulation game is safe for all ages!
Interactions of an object with another object can be explained and predicted using the concept of forces, which can cause a change in motion of one or both of the interacting objects. An individual force acts on one particular object and is described by its strength and direction. The strengths of forces can be measured and their values compared. What happens when a force is applied to an object depends not only on that force but also on all the other forces acting on that object.
A static object typically has multiple forces acting on it, but they sum to zero.
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August 15, at 3: By relativity, only gravity can compress space and slow down time. Now you seem to say there is this great process that can expand space and speed up time in the process too which by the way sounds like antigravity to me. If we can see some of that in the lab, that would be great. Also I find it is hard to say and understand that the early universe is smaller.
How is that exactly defined? Using current space and time as reference to gauge past space and time is confusing the matter further… John Campbell August 16, at At least, in the context of the Big Bang, universal symmetrical expansion. What I see is expansion due to the release of energy from destroyed matter in stars and galaxies. Expansion is relative to the amount of mass in the area currently undergoing nuclear interaction. Conversely, where stars and galaxies are less prevalent, expansion in less slower.
Expansion therefore, whilst universal, is neither consistent nor uniform, nor indeed does the universe increase in size overall. My best analogy would be a box the cosmos filled with millions of balloons representing galaxies and galaxial groups.
How New York can become a genius magnet: Now the speed-dating begins for the city to find a life partner to build this campus. In the process, New York City should not settle for an incremental upgrade to the college campus. This is a historic opportunity to draw on new ideas to build a true science and technology institution of the future. Advertisement Here are seven elements that New York City officials should look for in considering its proposals: Put entrepreneurs at the center.
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See More There are some universally acknowledged truths when it comes to dating. These themes are repeated on sitcoms, in romantic comedies and in your buddy Paul’s hookup stories that he totally swears are true, bro. And, according to science, most of it is wrong. That’s right; somehow, you know even less about romance than you thought you did. We have previously pointed out how the “nerdy gamer who has never touched a boob” stereotype persists in movies and TV right up to this very minute. When most people think of gamers, they’re likely to picture a very thin or very fat loner whose romantic resume consists of a few steamy Xbox Live chats and that one time he got flashed on ChatRoulette.
Sorry, non-gamers, but those WoW nerds probably have a more active love life than you do. The study we linked there found that gamers were twice as likely as their non-gaming counterparts to go out on dates in a given month. Admittedly, this is considered less about video gamers suddenly becoming suave ladies’ men and more about the way the growing gaming market is swallowing up people of all types.
That includes millions of attractive ladies, guys. You’ve got party games like Guitar Hero and Rock Band that are great ice-breakers have you ever tried coming up behind her and offering to help her play the song, then letting your hand “accidentally” fall onto her boob? Then of course you have all the people who have actually met in online games like World of Warcraft, some of whom have gotten married.
You can’t blame us here at Cracked for having a negative view of online dating, considering how many sites apparently have to rely on spamming our comment section to get the word out.
As I mentioned, there are exceptions — there is a group of guys who prefer older women, and there is a group of women who is uniquely attractive despite being older. But denying that a significant age difference is an issue is like denying that a typical woman wants to be with a guy who is taller. Many younger men appreciate the wisdom, intelligence, reponsibility and maturity an older woman brings to the relationship.
Most younger men in this study, preferred to date years older than their own age. You underestimate how many younger men are tired of the games women their age play. Again, there are exceptions, but relying on it is a risky proposition, to say the least.
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Speedometers by Chris Woodford. Excuse me, sir, have you any idea how fast you were going? That’s the question every motorist dreads being asked by a police officer at the side of the road. If you were staring straight ahead, not looking at the dashboard, you might have only a vague idea what to say. If you were looking at the speedometer, on the other hand, you’ll know the answer exactly, possibly to within one or two kilometers or miles per hour.
Have you ever stopped to think how a speedometer actually works? It’s a really ingenious use of electromagnetism! Speedometers might look like moving-coil meters voltmeters, ammeters, and so on , but they work in a totally different way. How to measure speed If you’ve read our article about motion , you’ll know that speed is very simply defined: So if you go kilometers and it takes you four hours to do it, your average speed is 50 kilometers per hour. Measuring your average speed after you’ve traveled is not actually that much help, especially if a police officer is asking you questions.
How fast were you going sir?