Denne matematikprøve forvirrer voksne - kan du regne den ud? ’Der var nogle mennesker på et tog. 19 personer står af toget ved første stop. 17 personer står på toget. Nu er der 63 personer på toget. Hvor mange mennesker var der på toget i første omgang?’ Sådan lyder en matematikopgave målrettet engelske skolebørn i de mindre klasser. Et billede af problemstillingen er gået viralt på de sociale medier, efter en mor har lagt det op på Twitter. Moren bag billedet mener nemlig ifølge britiske Metro, at opgavens facit er 46, og det har i høj grad forvirret andre Twitter-brugere, der selv har kastet sig over opgaven med stor entusiasme. Prøv selv at se, om du kan regne dig frem til svaret, og tast det ind i afstemningen under artiklen. Eller find svaret ved at klikke videre i billedgalleriet i toppen af artiklen. Hvis du synes, denne opgave var nem, kan du da også lige tjekke, om du kan klare regeringens nye adgangskrav til gymnasiet.
Arguments For And Against Nuclear Power Philosophy Essay The title question of my case study is: 'Should Nuclear Power be Banned'. I have chosen this question as I believe it is a key topic at this present moment in life, with a lot of information about it in the media, such as on the news and in the papers each day. Also it is something that will affect the life in which we live in the future. So because of these reasons it is something that people need to be aware of and need to actually understand what nuclear power is and how it is affecting us or is going to affect us in the years to come. Evidence for: 'One major problem that could occur with nuclear power is that there is always the risk that there could be a leakage' of radioactive fluids, which will have a massive impact on the environment and its surroundings. Struggling with your essay? Get The Grade You ordered Evidence against ( 25th September 2010, 10:30. Nuclear power is made and generated by using Uranium. 30thJanuary 2011, 17:00.
Physicists Test the Response Time of Electrons Attosecond flashes of visible light make it possible to measure the delay with which electrons react to the exciting light because of their inertia. The characteristic form of the light wave arises because the researchers at the Max Planck Institute of Quantum Optics form the pulse from light of different wavelengths. Researchers from the Laboratory for Attosecond Physics generated for the first time visible flashes of light in attosecond dimensions. Light could be the driving force which makes electronics even faster in the future. An electron weighs almost nothing at all. “Our research thereby puts an end to the decade-long debate about the fundamental dynamics of the light-matter interaction,” says Eleftherios Goulielmakis. Measuring the response time of an electron: The capability of shaping attosecond pulses of visible light enables control over electrons with unprecedented precision Visible attosecond pulses are formed from light of different wavelengths Publication: M.
Denne mattegåten har to løsninger, men ett svar er «riktigere enn det andre» (Dagbladet): Dersom du i løpet av den siste uka har vært innom Facebook, er sjansene gode for at du har kommet over følgende matematiske gåte: Spørsmålet er hva som skjuler seg bak spørsmålstegnet. Mysteriet ble først lagt ut av Randall Jones på Facebook, og har i løpet av ei uke samlet over to millioner svar, 371 000 «likes» og har blitt delt over 100 000 ganger. Han påstår også at bare én av tusen vil svare rett. To løsninger Ved første øyekast ser det ut til å være to muligheter. Den andre metoden, naturlig nok da «Alternativ B», tar utgangspunkt i at det mangler en form for multiplikasjon. 1+(4x1)=52+(5x2)=123+(6x3)=218+(11x8)=96 Manglende rekker? 96 og 40 er de samme to løsningene som florerer i kommentarfeltet under innlegget til Jones. Men ett av svarene er «mer riktig» enn den andre. Det er en gitt differanse mellom tallene som skal adderes i hver linje. A eller B? Det elegante ved gåten nå, er at uansett hvilken av de foregående framgangsmåtene som brukes, vil svaret bli det samme.
Essay:Arguments against nuclear power  Nuclear waste The anti-nuclear movement is preoccupied with the problem of nuclear waste and its possible impact on the environment and health. Generation of nuclear waste, which is dangerous to all known forms of life, is a valid concern about nuclear power, and the problem must be addressed in an environmentally sound way. However, there is no reason to believe this problem is insoluble. Here are some claims made by the anti-nuclear movement in reference to the waste issue. More: Nuclear waste  There is no solution The validity of this claim is highly dependent on your definition of "solution". If we define "solution" as something that lets humanity forget about the waste without adverse consequences at a cost that is a small portion of the price of generated electricity, then there are a few options.  It will remain toxic for millions of years  There vast amounts of it  It is a burden on future generations  The public will pay for its disposal 
The Experiment That Will Allow Humans to “See” Quantum Entanglement Entanglement is the strange phenomenon in which two quantum particles become so deeply linked that they share the same existence. When this happens, a measurement on one particle immediately influences the other, regardless of the distance between them. Entanglement has puzzled physicists for the best part of a century. The ease with which particles such as photons can be entangled has led some physicists to ask an interesting additional question: will humans ever be able to “see” entanglement? Today we get an answer thanks to the work of Valentina Caprara Vivoli at the University of Geneva in Switzerland a few pals. Finding a way for a human eye to detect entangled photons sounds straightforward. Such an experiment might consist of a source of entangled pairs of photons, each of which is sent to a photo detector via an appropriate experimental setup. It’s easy to imagine that this experiment can be easily repeated by replacing one of the photodetectors with an eye. That’s the theory.
Lower Secondary Page Simple ideas, like adding together two odds to make an even, can lead to fascinating insights with important real world applications. In this feature, we have chosen some resources from the Exploring Our Number System pathway on wild.maths.org. Here's how you can send your solutions to these problems. Charlie's Delightful Machine Stage: 3 and 4 Play with our interactive machine and see if you can work out how to switch each light on. Factors and Multiples Chain Each number must be a factor or multiple of the last. Always a Multiple Think of a two digit number, reverse the digits, and add the numbers together. How to Solve Equations Watch this talk by Dr Vicky Neale as she explores some equations, and covers some highlights from the rich history of number theory along the way.
For and Against - Nuclear energy in the UK I come to this subject with some trepidation as, unlike most commentators, it is not one I get particularly het up about. While I have dedicated much of my life to reducing our impact on the planet, I am not a political Green. I have never owned a Citroën 2CV, I am not a veggie, and the only time I ever hugged a tree I felt like a right charlie.A significant amount of anti-nuclear sentiment is driven by an ideological, almost religious, belief that the technology is ‘evil’. So can the currently becalmed UK nuclear energy rise again to become a sustainable energy solution? The first meaning is sustainable in a practical sense. So where are we with ‘peak uranium’? The second meaning of ‘sustainable’ is in the context of Sustainable Development, defined by the UN’s Brundtland Commission as “development that meets the needs of the present without compromising the ability of future generations to meet their own needs”. A third, meaning of ‘sustainable’ is politically sustainable.
Physicists Test Classic Paradox 'Maxwell's Demon' with Beams of Light In 1867, renowned physicist James Clerk Maxwell wrote a letter to fellow physicist and middle-name enthusiast Peter Guthrie Tait in which he outlined a thought experiment that seemed to allow for the violation of the second law of thermodynamics. The thought experiment has become known as Maxwell’s demon and it has been widely studied in the 140 odd years since its proposal. Most of these studies have been theoretical, although a handful of experiments have actually managed to realize Maxwell’s thought experiment in a lab. Recently, a team of physicists from Oxford became the first to create a photonic Maxwell’s Demon. To create its photonic demon, the team began with Maxwell’s original hypothetical, wherein the physicist imagined that two boxes filled with gasses were placed next to one another with a demon controlling a small door between the two chambers of gas. In the Oxford experiments, physicists exchanged the chambers of gas for two beams of light.
“Tænk ud af boksen” – øvelsen! | Kreativ Proces Det lyder nemmere end det er. At tænke nyt. At tænke ud af boksen. Frasen kommer fra en helt bestemt lateral gåde (9 priks øvelsen), som lyder sådan her: Her er 9 prikker. For at løse gåden skal man tænke ud af boksen. Horizontal tænkning hedder det på “Den Kreative Platform” og lateral tænkning er det tilsvarende De Bono begreb. De Bono har en eminent evne til at forklare (sælge) sine hypoteser og det kan vi vist lære meget af. Og der findes mange eksempler på lateral tænkning, ud over De Bono’s Nå men svaret på 9 priks gåden kommer her, hvis du ikke allerede har gættet den:
Nuclear power debate Stewart Brand at a 2010 debate, "Does the world need nuclear energy?" The nuclear power debate is a long-running controversy about the risks and benefits of using nuclear reactors to generate electricity for civilian purposes. The debate about nuclear power peaked during the 1970s and 1980s, as more and more reactors were built and came online, and "reached an intensity unprecedented in the history of technology controversies" in some countries. Thereafter, the nuclear industry created jobs, focused on safety and public concerns mostly waned. In the last decade, however, with growing public awareness about climate change and the critical role that carbon dioxide and methane emissions plays in causing the heating of the earth's atmosphere, there's been a resurgence in the intensity nuclear power debate once again. Two opposing camps Lowe, in turn, makes the following arguments against nuclear power: Electricity and energy supplied George W.
How We Entered a New Era of Astronomy Last week, a new era of astronomy began as Laser Interferometer Gravitational-Wave Observatory executive director David Reitze stood before a packed room at the National Press Club in Washington, DC, uttering the words we’ve been waiting a century to hear: “We’ve detected gravitational waves.” Applause erupted from the room and all across the globe as universities, individuals, and institutions were watching via a live feed. LIGO is a $1 billion international collaboration with nearly 1,000 scientists working together, hoping to catch a glimpse of the enigmatic cosmic phenomenon known as gravitational waves. 100 years ago, Einstein first predicted the existence of gravitational waves as part of his theory of general relativity, which says that space and time are not two separate entities, but part of a dynamic, interwoven fabric called space-time. "The information carried on the gravitational wave is exactly the same as when the system sent it out; and that is unusual in astronomy.