What Is Chemistry?

What Is Chemistry?Chemistry is a field that uses tools and techniques to discover how two substances react with each other. It is considered a broad topic and is approached in different ways by different chemistry courses.The basics of chemistry may be learned in a basic chemistry course and beyond that, students may require additional chemistry courses to expand their knowledge and abilities. A wide variety of skills are required to conduct proper experiments and analyze chemical reactions.In chemistry, the starting point is basic chemistry, which deals with the development of chemical elements and the basic methods of chemical reactions. It also involves the study of the structure of atoms and molecules and the role of mass and charge in physics. The materials used in chemistry usually include solvents and the periodic table of elements.Chemical engineering involves the study of the nature of the reaction between substances. It is the modern chemistry that covers the transfer of en ergy from one substance to another, which is commonly known as chemical evolution. After the industrial revolution, chemists studying engineering had to work out new materials and processes for their industry, because of the need to create chemical products.The study of chemistry in medical sciences is now popularly known as diagnostic chemistry. It covers the understanding of the nature of chemical compounds, and their interaction with each other and the human body. This area includes the study of the development of cancer and its treatment.The study of chemistry in other fields is a common application in everyday life. A good example is in engineering where people study how electrical power is generated, which is a combination of the chemistry of electricity and the physics of an object being made of electricity.All these fields have their specific scientific areas of study. Each of these disciplines is vital in the development of society, and it is believed that all would benefit from having an additional science course.

German Classes in Cardiff

German Classes in Cardiff How to Choose a German Course in Cardiff? ChaptersLearn German at Cardiff UniversityGerman Lessons with Language TrainersGerman Lessons with a Private TutorGerman Language Courses at CactusIf finding German lessons in Wales’ capital city were an onerous task, the tone of this article would be a touch reticent... maybe even gloomy.Fortunately, you can find all manner of outlets through which you could pursue your passion for German studies so we can happily discuss the extensive list of ways you might learn German.If you were thinking of learning a foreign language but weren’t sure which one you should tackle, let us take a moment to make the case for learning German before we go on to describe the many places you could take lessons.German is spoken by more than 132 million people worldwideIt is considered the second language of business and science (after English)English is a Germanic language, making it one of the easiest languages for English speakers to learnGermany is Europe’s economic powerhouse and its capital ci ty, Berlin, is THE European hotspot for entrepreneurs and tech startupsDiscover another dimension to the Internet: German websites command the third-strongest presence of the entire worldwide webEnjoy the rich German culture the way it was meant to be enjoyed!Have you been to Cardiff Oktoberfest? How would you like to experience the real festival, in Munich?Sure, you could go there strictly as an English speaker â€" the Germans have it all over us in language learning, but if you did that, you would miss the subtle nuance, the authentic German-ness of it all!These are just a few reasons to learn German, there are many more (and, surely, you have your own).Now that your interested is piqued, we recommend you take the bratwurst on the grill, pour yourself a pint and settle in for a read on where to find the best German classes in Cardiff.the course for you.The bad news is that if you had hoped to master a measure of German before your upcoming holiday in Austria, Switzerland or German y, you will have to find another class; this one doesn’t start until October.If you need to find German lessons in Edinburgh, Superprof has got you covered!Your tour of the Reichstag would be so much more informative if you could understand German! Image by Pexels from PixabayGerman Lessons with Language TrainersLanguage Trainers is a UK-wide franchise specialising in connecting language learners with the teachers that best suit their needs.For instance, if you work for an international company that has landed a big contract with a firm in Luxembourg, you and your colleagues may have to learn Business German rather quickly.Conversely, if you are one of those aforementioned GCSE students needing a bit of guidance in your language study, you may prefer to take lessons with them, one on one or online.For that matter, Language Trainers makes online lessons available to anyone!Even if you and your partner are planning a getaway to the Swiss Alps and wish to take language classes togeth er, that option would be open to you.You may contact them to get all of the details for signing up but it would be easier to visit their website for all of the information you need.While you’re there, you might take their free placement test to help your advisor to determine which instructor to assign to you. You may also take advantage of their offer of a free lesson online, via Skype.And, to sweeten the deal still more, why not jump on their special summer rate?You could hardly get better German lessons, even in London!Listen and Learn German Language CourseThis company is another national franchise that is very successful in imparting German language skills.You may choose to join a class of students who are learning at the same level as you, take private lessons â€" one to one or two-to-one, or you and your partner could engage in online language learning.Listen and Learn makes a clear distinction between their general German lessons and teaching German for business so you will have to make it known to your prospective teacher what your language learning goals and needs are.Their website also offers a free level test â€" a step you may bypass if you are an absolute beginner at speaking German.However, if you can speak intermediate German, it would be a very good idea to take their German test so that your prospective teacher does not cover grammatical cases you already know.Listen and Learn is also offering special pricing if you sign up during the summer months; you may find it to be quite a bargain!Do you know what options there are for learning German in Birmingham?German Lessons with a Private TutorAt this point, your fervent desire to learn the language of Goethe may be precariously balanced against everything else in your life: family commitments, work, friends... and the sheer exhaustion at the end of the day.With all of that, who has time to run out to class after tea?The better question would be: how would you like to have your language lessons c ome to you?Taking lessons with a German tutor in your home offers several advantages, the main one being that your tutor will focus exclusively on you and your language learning needs.Learning German in your home allows your language tutor to conduct lessons in a more relaxed atmosphere; one less focused on a set curriculum and more open to your overall curiosity about the language and culture of Germany.Can you find such a tutor in Glasgow?Such a tutor would be helpful to any students you have living at home, as well.If your student is struggling to master the more advanced German vocabulary s/he would need to earn high marks on A-Levels or GCSEs, such a tutor would give him/her an enormous advantage.Superprof has nine German tutors in the Cardiff area, some of whom are native German speakers and all of whom have extensive teaching experience.You may choose to take classes online with Howard or Ulduz, or you may work with Kristel or Helen in your home.You might think private lesson s would be expensive but Superprof tutors work hard to dispel the myth that learning German must cost a lot: the average price per hour is only £21 and most of these tutors give you the first lesson at no charge!Whether you want conversational German lessons ahead of your next holiday or want to give your German learner an edge on his exams: with Superprof, private tutoring is within your reach.Discover where citizens of Leeds learn German phrases...You will find many opportunities to learn Business German in Cardiff, either with a personal tutor or through a language school Image by Jerry Kimbrell from PixabayGerman Language Courses at CactusNow we’re talking about an evolved language school whose flagship is Business German (and other languages).Cactus has partnered with a respectable stable of international companies that rely on them for their staff’s language training needs but that doesn’t mean there is nothing there for you!If you need to learn German for business purp oses, you may take Beginner German all the way through advanced level courses.Along the way, you will learn business- and industry-specific vocabulary, along with public speaking skills â€" in German, of course.Remember how, at the start of this article, we mentioned that Berlin is the best place to be if you are a tech start-up?Cactus Language Training will make sure that you are fully prepared for your business launch, be it from Berlin or Bremen.They won’t just teach you new language and reading and writing in German; they will go beyond the standard of foreign language courses to see that you understand the intricacies of German business etiquette.Are you still here, or have you gone to find these German lessons in Cardiff?Now find out where else in the UK you could take a German class...

Piano Lessons for Kids the Benefits and How-Tos

Piano Lessons for Kids the Benefits and How-Tos What Are The Benefits of Teaching Piano to Children? ChaptersWhy learn piano? Is it beneficial for children?What age should one begin piano instruction?How to get young kids interested in playing piano?How you can help your child learn?Enrolling your children in beginner piano lessons is probably one of the best things you can do for their education. Learning the piano brings numerous benefits â€" all explained in detail for you here â€" that will help shape their future social lives.With the help of beginner piano classes, your child will learn to be more spirited, sociable, determined, creative, sensitive and curious. (in addition to learning the difference between quarter notes and a metronome!) Plus, these virtues will be stronger the earlier your child begins piano lessons: that is, if he or she learns to read a piece of sheet music before learning to read a book in school, they will start with a large advantage compared to their non-musician playmates!Whatever your ambition â€" playing for pleasure or studying to become a pianist â€" beginner piano requires motivation, desire, rigor, perseverance, and fun! These four values must come naturally and become reinforced over the course of music training.Jazz piano, classical piano, variety, rock, tango… different styles will affect the content of your piano instruction. From private lessons to the conservatory, online piano courses to piano training in a music school, the choice for education is vast. This is especially true in today’s digital age, where it’s easy to find tutorials and free online classes to learn to play the piano.So it’s up to you to choose the method and style that works the best for your children. Here are the reasons we at Superprof think it’s a fantastic idea to enroll your child in beginner piano lessons to play correctly. LouisPiano Teacher £40/h1st lesson free!Discover all our tutors AlisonPiano Teacher £32/h1st lesson free!Discover all our tutors BarbaraPiano Teacher £50/h1st lesson free!Discover all our tutors Chi yuenPia no Teacher 5.00 (5) £30/h1st lesson free!Discover all our tutors TomPiano Teacher £25/h1st lesson free!Discover all our tutors ErenPiano Teacher 5.00 (5) £40/h1st lesson free!Discover all our tutors ValtiePiano Teacher £35/h1st lesson free!Discover all our tutors DanielPiano Teacher 5.00 (5) £37/h1st lesson free!Discover all our tutorsWhy learn piano? Is it beneficial for children?It can never be said enough:  teaching piano to your child will bring many positive, and often unexpected, effects that will serve to help his or her social interactions.Here are the major benefits of learning piano for young students:Since the 19th century, well known sociologists such as Durkheim  have argued that school allows children to explore another social world in addition to the more limiting one of the family circle. The same goes for music.In beginner music classes, your little one will meet other children of the same age. Their classes will interweave musical and social skills early on . Growing up, your child will play with other kids in a music school, conservatory, or in an orchestra. By the same token, he or she will establish a relationship and bond with a music teacher. If your child learns music before starting school, the student-teacher relationship will be one of his or her first interactions with an adult outside of the family.The piano also stimulates children’s cognitive and scholastic capacities. A study led by F. Rausher and G. Shaw has shown that children who play piano develop spatial reasoning aptitudes faster than others. All this from banging on a piano keyboard!Piano playing stimulates cognitive and listening capacities in children.The hearing and motor functions of musicians are more developed than those of non-musicians. Because listening shapes the musical ear and coordination, it also improves one’s movements in space. So there are more benefits to proper posture for the piano than you thought!A trained pianist will have better scholas tic results than the rest, as music class teaches children about relationships, discipline and effort.Learning solfège  and playing on 88 keys also plays a role in brain development: the person becomes more skillful, more inclined to learn different languages and read piano notes, a scale and chords more rapidly. They’ll be playing like Mozart in no time!This will make training on other instruments and overall music comprehension easier in the long run.So now that you’re convinced about enrolling your child in beginner piano lessons, you must decide what age to do it at!What age should one begin piano instruction?It’s often said that there is no ideal age for learning to play the piano, that one can start at any point in life. However, those under the age of 3 are too young to attentively follow a music class or piano course.Even tiny fingers can reach those keys!Beginner’s music classes allow children to discover the world of music: rhythm, sounds, ear training, all while having fun. If children associate the piano to something enjoyable, they’ll be eager to learn those keys!To encourage your children, it’s important to regularly give them positive reinforcement, and find a piano teacher who can adapt his or her method for very young beginners.Although there’s no official age to learn the piano,  at 7 years of age, children are at their most malleable neurologically: their brains are like sponges and sop up new things more rapidly than adults. This is also around the time that they can truly understand solfège and begin to learn sight reading. So encourage them to take piano lessons as soon as they get to primary school.Also, from adolescence, piano lessons might be abandoned in order to play guitar, which seems a bit cooler at that age! (Well, this is at least the case for rock guitar as opposed to flamenco or classical guitar.)Try to explain to your son or daughter that, in addition to being “cool,” the piano is a very good base instrume nt for playing a range of music styles and understanding music theory, which is necessary for playing other instruments including the guitar.Remember that many composers and famous pianists began very young, while others encountered the piano later in life, as adults. Even you can play! Perhaps the common excuses we use â€" that our fingers become stiffer, we have less time for piano lessons and less capacity for learning â€" are simply to hide our lack of motivation?Although adults are already developed mentally and muscle wise (in relation to children), they already possess a deep musical culture and more money to play for piano lessons!Learning beginner  piano, even for those over 40 or 50 years, can be a factor that reduces future cognitive patholological disorders such as Alzheimer’s disease:  the brain is a muscle, nothing is unalterable and even a senior citizen can learn to play if he or she wants to!How unfair and sad would it be if private lessons were reserved for young people? In fact, studying the piano at the same time as your children could be a great way of motivating them!How to get young kids interested in playing piano?In order to encourage your child to play piano class they must have fun with it.Enrolling your child in piano lessons will bring more benefits than playing on the PlayStation!The piano must be a fun endeavour, and not torture. If going to lessons seems to be a source of angst, tension, or stress, there’s little chance your child will want to continue studying those piano scales.To make sure the piano lesson is a good experience, you must find a good piano instructor, with a fun and simple pedagogical method. How would you like having at-home lessons?Superprof has so many established pianists that are waiting to hear from you! But don’t just get in touch with anyone who is giving away free lessons: the teacher must be experienced and good at children’s education. Going with a conservatory graduate destined to become a r enowned pianist, but who doesn’t know how to adapt his teaching to children, risks turning your child off music.If you yourself are a musician â€" amateur or professional â€" it will be that much easier to motivate your children. Do at home beginner music lessons and solfège instruction, letting them interact with your instruments.The internet also offers excellent training methods for online piano â€"  this will allow your child to learn to play piano without having to go anywhere! Online piano classes and video lessons are a gold mine of efficient, fun, and motivating learning methods.In the big American cities, private music schools, and municipal schools and associations welcome children of all ages.Lastly, listening to music at home is very beneficial. This can be a means of motivating your children: playing jazz or classical music piano pieces from when they are very young, might make them want to learn the piano to play what they hear.How you can help your child learn?So a few months have gone by since your child started private piano lessons but it seems that progress has been minor. If your child is stumbling over a piano tune, it’s actually a good sign! But how can you make sure that he or she is working well? How do you make the most of these lessons (that you are paying for)?Instructors should be teaching all aspects of piano playing, including:Posture workSolfège trainingPracticing songsPiano chord progressions and arpeggiosReading musicHowever,  the piano instructor cannot always be on the student’s case.The student is often alone with his or her keyboard. In order for a child to learn to play the piano, he or she must regularly practice. It’s better to do 20 minutes every day rather than cramming all the practice into the 2 hours before a lesson. This is because the brain needs time to ruminate, reassess, practice, and settle.And parents have a role to play in encouraging this behaviour â€" remember that piano lessons of high caliber a re a true team effort!Find piano lessons near me.

Tricks For Differentiating The Two Blues Chord Progressions

Tricks For Differentiating The Two Blues Chord Progressions Sign up successful I typically teach one song for each. The first is Robert Johnsons Sweet Home Chicago listen to the song here: The other song I like to use is Leroy Carrs How Long Blues: Ive taught other students (with whom a shared enthusiasm for blues and blues-based music is not as apparent) each progression using other tricks. The Eight-Bar Progression Begins With Two (Not Four) Measures Of The First Chord The structure of the twelve-bar pattern is as follows: E-E-E-E-A-A-E-E-B7-A-E-E/B7. Although Johnson switches to A for the second measure and then back to E for the third (which is an acceptable variation), he adheres to all of the changes Ive identified. The eight-bar progression follows a similar albeit condensed sequence: E-E-A-E-E-B7-E-E/B7. The YouTube version Ive included above involves another acceptable variation: an A minor chord instead of an E major one during the fourth measure of the verses. One of the easiest differences to remember between this sequence and its twelve-bar counterpart is the opening of each. The eight-bar opening is merely half the length of the twelve-bar one as E (in this case) and is played for only two measures. The Eight-Bar Progressions First Change Lasts One (Not Two) Measures Again, the eight-bar pattern represents 50% of another of the twelve-bar segments as A (in this case), and is played for only one measure. The Eight-Bar Progressions Closing Involves Two (Not Three) Chords Think of the twelve-bar closing as rolling down a hill. You start at the top (at B7 in this case), roll down to the chord behind it (A), and arrive back down at the foot (E), staying on each chord for no longer than one measure. The eight-bars closing (by contrast) involves a simple return to the foot. You might even consider using Star Trek terminology here and think of your hand being beamed back down to E instead of rolling back to it. The ending measure of each of these blues chord progressions is identical, though probably the most difficult measure (in both cases) to learn to play. It involves more than one chord and a change only one-fourth of the way in (EB7B7B7). I dub this final chord (B7) the interrupting chord. Unlike the other chords, its awkward and abrupt. However, its as essential to each progression as the other chords are. A feisty accent is a more acceptable ending for a blues stanza than merely having it drift off on the chord it began on. Samuel B. teaches beginner  guitar lessons in Austin, TX. He teaches lessons face-to-face without sheet music, which is his adaptation of Japanese instruction (involving a call-and-response method).  Learn more about Samuel here! Interested in Private Lessons? Search thousands of teachers for local and live, online lessons. Sign up for convenient, affordable private lessons today! Search for Your Teacher Photo  by  simon_music

Why Should You Learn Portuguese

Why Should You Learn Portuguese 15 Reasons to Learn Portuguese Chapters1- Benefits of Learning Portuguese: It Is Spoken All Around the World2- Learn to Speak Portuguese Because Few English Speakers Speak It3- Because it Will Set Your CV Apart4- Learning Portuguese Because Brazil is An Economic Powerhouse5- Because There Are Many Portuguese and Brazilian Expats Living Around the World6- Because Portuguese is Spoken  More and More Around the World7- Because it is a Musical Language8- Learning to Speak Portuguese For Portuguese Music9- For Portuguese and Brazilian Culture10- To Not Miss Out on Anything on a Portuguese or Brazilian Trip11- Because It's Not A Difficult Language to Learn12- For Those of You Who Have Spanish It's Even Easier13- Because You May Want to Move to Portugal when you Retire14- Because You May Want to Become an Expat in Brazil15- To Prove to Yourself That You Can Do ItRegardless of your personal motivation for learning Portuguese, you will find it to be an interesting and rewarding experience.It doesn't matter if you want to l earn European Portuguese in order to spend some time living in Lisbon, or if you need a few key Brazilian Portuguese expressions to hold a conversation on a backpacking trip through the Pantanal. You will find a number of different ways to learn Portuguese, but you should pick one that matches your personal goals. After all, learning a few phrases and mastering the ins and outs of Portuguese grammar are two completely different endeavours.Obviously you'll need to be aware  of how much Portuguese lessons cost  to ensure they fit your budget, but it is definitely an investment that you should make. Throughout this article we will look at some of the different reasons why you should learn a language that is spoken by over 220 million people in countries like Portugal, Brazil, and Angola.Portuguese London shopping.5- Because There Are Many Portuguese and Brazilian Expats Living Around the WorldExperience the enthusiasm of the Portuguese football cultureTaking Portuguese courses London i s also a great vehicle for integration and lively discussions with the large Portuguese and Brazilian communities across the globe. Their legendary enthusiasm for sports and music will be better understood by you once you have a grasp of their musical language!Wouldn't it be fun to go to a bar and watch a Selecao match (Portugal national football team) as a Portuguese-speaker?6- Because Portuguese is Spoken  More and More Around the WorldAs we have seen, the Portuguese language is essentially spoken by its natives. The number of people who have Portuguese as their official language is likely to increase thanks to the recent growth of Brazil.But not only that. The economic growth of this awakening giant will mean that, in coming years, the Portuguese language will really come into its own as an  economic asset.UNESCO estimates that by 2050 Portuguese will be spoken by around 335 million people around the world.7- Because it is a Musical LanguageThe Portuguese alphabet includes 9 vowe ls, 10 different diphthongs (syllables with two vowels), 5 nasal diphthongs, and 25 consonants.This means a great diversity of sounds, which is rare for a foreign language. With this, there are  many more nuances than in English.Learning to speak Portuguese is also a little like learning how to sing!learning Portuguese comes in all shapes and sizes.So before taking the leap and departing to a Portuguese-speaking country, why not take some portuguese lessons online? Many possibilities are available online, from interactive and playful courses (courses via applications for example) to more classical classes (private lessons with a Portuguese tutor). And do not hesitate to contact the many Portuguese Superprofs on our platform!However you decide to learn Portuguese, and regardless of your motivation for doing so, you'll need to practise in between Portuguese classes in order to be successful! Language learning is not just about what you do in the classroom.

How to Eliminate Multiple-Choice Answer Choices Like a Pro

How to Eliminate Multiple-Choice Answer Choices Like a Pro As test-takers, weve all encountered difficult questions and questions we just dont know the answer to. Weve also come across questions whose answers seem to be at the tip of our tongue, but we just cant decide between two or more choices. Here are some strategies you can use that will help you eliminate multiple-choice answer choices in smart and effective ways. 1. Reread to better understand the question Before eliminating any answer choices, make sure you understand the question to the best of your ability. If youre able to, highlight, underline, and/or circle key words in the question to make sure you dont miss any significant parts. Look for words like not or except that would flip the entire meaning of a question. In addition, look for possible answer choices like all of the above and none of the above. Knowing the question, as well as the layout of your answers, can help you better understand what to look for and prevent careless mistakes. [RELATED: Important Habits of Effective Test-Takers] 2. Take away any obviously wrong answers Begin by eliminating any answers that you just know are wrong. This may not happen in every case; sometimes youre not sure if any choices are wrong, and thats okay. If you do, though, take advantage of mentally or physically crossing said answer(s) out on the page. This will help you focus solely on the remaining answers and increase your chances of choosing the right answer from those still left. 3. Look for absolutes Check your answer choices for words like never, all, every, always, or none. These are likely not to be the correct answer. This is not to say that every answer that includes absolute words is incorrect (so keep on a lookout!), its more that they often do not allow for subtlety or complexity as other answers often do, and they can be extreme. 4. Check for unrelated or extreme information In the same breath, youll want to look for answer choices that are outliers. If the answer choice seems like a true statement, greatbut make sure it is definitely related to the question. Sometimes, writers of tests can trick students into choosing an answer that seems correct, but has little to do with the question. At the same time, look for answers that offer extreme information. Often, theres one answer choice that seems very different from the rest. This one is often incorrect, as tests are more about having you discern between a few very similar answer choices, rather than choosing one obviously right answer. 5. Use information from other questions to help If youve already eliminated one or more choices, but are still not sure which of the remaining is correct, skip and come back. Sometimes, later questions can illuminate this one question youre struggling with. A reading passage or even an answer choice from a different question can offer information that can help you, or at the very least, jog your memory. When youre struggling with how to eliminate multiple-choice answer choices, dont fret! As calmly as you can, begin eliminating answers. Keep in mind that some tests do not penalize you for wrong answers (like the new 2016 SAT), while other tests deduct points (or a fraction of points) from wrong answers, so that can help you decide whether to make an educated guess or leave a question blank. Good luck!

Online Types of Angles Tutors

Online Types of Angles Tutors Angle is formed between two lines or rays and an angle is the measure of rotation between those lines. There are different types of angles in geometry. An angle which is less than 90 is known as an acute angle, an angle which is exactly equal to 90is known as a right angle, and an angle greater than 90is known as an obtuse angle. An angle that is exactly 180 is known as a straight angle and the angle which is greater than 180 is known as a reflex angle. Example 1: Angles in a triangle are 45, 45 and x. What is the value of the third angle? Sum of the angles in a triangle= 180 This gives: 45 + 45 + x = 180 Now in order to solve for x, we can add the numbers first. This implies: 90 + x = 180 Hence, x = 180 - 90 = 90 Therefore the measure of the third angle, x = 90 Example 2: A line divides another straight line into two angles. If one part of the angle is 97, then what is the other part of the angle on the straight line? Given one part of the angle on the straight line = 97 Let the other part of the angle on the straight line = x Total angle on a straight line = 180 This implies: 97 + x = 180 Hence, x = 180 - 97 = 83 Therefore the measure of the other part of the angle, x = 83

Translate the Web, Learn English Free

Translate the Web, Learn English Free Luis von Ahn wants to teach you English, free.My brother sent me a link to a TED talk the other day that he was really excited about. I had planned to write about the problems speakers of Latin-based languages encounter with the verb passed and the adjective past but after watching this video, Ive decided to save it.The TED video is of Luis von Ahn talking about how he wants to translate the entire internet, and teach people English, or any other language, for free. You might be surprised that were writing this, since we teach English. But what Mr. von Ahn is doing is more a replacement for expensive software, like Rosetta Stone (which he mentions in the video). I dont think you can ever replace live conversations with native English speakers as a way of learning English.Anyway, the TED talk below explains how von Ahn really plans to help people learn English and other languages for free, through his website, Duolingo. You can watch the video, then try to answer the questions below i t. If you want to take a class based on this video, contact us. What was his first project?Why did the words he showed on the screen cause confusion?Who many people were using his CAPTCHA every day?How many hours were being wasted by people typing those every day?What amazing thing is your brain doing when you fill out a CAPTCHA?What does CAPTCHA do now?What number is common among humanitys large scale achievements?What does he want to do to the web?How much would it cost to translate Wikipedia into Spanish?What is his solution to the translation problem?What is surprising about Duolingo translations vs professional translations?In _____ the student ___ Rosetta Stone _____.How do people pay for Duolingo?