Prática de Shadowing: 5 Fun Physics Phenomena - Aprenda a falar inglês com vídeo
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Five fun physics phenomena.
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Number one: Have a friend hold a cane out horizontally for you or another similar object,
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and putting your two index fingers together try to place them underneath the center of mass.
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When they let go, you will find it doesn't normally work.
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But, Now try putting each index finger at opposite ends of the cane, and then moving your index fingers in towards the middle.
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what you will find is that they always end up right under the center of mass of the cane.
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You can try starting off asymmetrically.
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and they will still end up under the center of mass.
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You can try going at different speeds really slowly.
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you Or really fast?
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but you still end up perfectly under the center of mass.
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How does this work?
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Number two: The Phone Flip.
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Have you ever tried to spin your phone?
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If you do it in this direction, it's pretty easy.
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It stays nicely aligned.
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If you spin it along its short axis, you'll also find it spins very well.
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But, if you try to flip your phone end over end like this, you can't do it cleanly.
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The phone will never flip simply end over end without also rotating in one of the other directions.
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Even when I make an almost perfect flip, instabilities grow until the phone rotates around another axis.
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Why can't...
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No, I still can't do it.
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Why is it so?
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Number three.
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You've probably seen that if you rub a cup on your hair, you can make it electrically charged, and if you bring it close to a stream of water,
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you can actually cause that stream to deflect.
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Now usually this is used in chemistry textbooks as a demonstration of the polar nature of water.
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Water is a molecule with a more positive side and a more negative side.
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And so what happens, so you're told, is that the water molecule flips around
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so the positive side of the water faces the negative side of the cup
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and that is what attracts the water to the cup.
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But this is not the real explanation.
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If you have a uniform electric field, there's an equal force pulling the positive side towards it as there is pushing the negative side away from it.
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And so you can't actually do more than just turn the molecules.
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you would need a really, really strong gradient in your electric field to make this work at all
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and it basically is just not going to happen from a cup.
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So why is the stream actually attracted to a charged cup?
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That is the question.
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Number 4 Take a piece of your favorite cereal and drop it into a bowl of water.
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Then, using a very strong magnet, try to pull the cereal around.
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Bye.
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Isn't that cool?
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So why is cereal magnetic?
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And finally, five: the teabag rocket.
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Take a tea bag and cut off the sealed end very carefully.
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Now dump out the tea.
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Form the tea bag into a square column.
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and balance it on the plate.
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Now, light the top of the teabag on fire.
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Try to light it evenly on all sides.
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Get ready for takeoff in three, two, one.
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Ha, yeah!
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That is the beauty of the T -Bag Rocket.
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So why did that happen?
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So how do all of these phenomena work?
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Let me know in the comments, or make a video explaining any or all of them, or subscribe to the channel, and I'll post the answers next week.
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I hope you enjoyed those fun physics phenomena.
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I know a guy who would, the former commander of the International Space Station, Commander Chris Hatfield.
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I'm actually hosting live events with him in late August in Sydney and Canberra.
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I am so looking forward to that.
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Now the Sydney shows are all sold out, but there are still, as of now, tickets to the Canberra show.
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So if you want to come to that, check out the link in the description.
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Now Chris Hatfield actually wrote a book called "An Astronaut's Guide to Life on Earth."
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people who want to become astronauts but also for everyone who wants to lead a meaningful life here on Earth.
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And you can download this book for free
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if you like by going to audible .com /veritasium
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or you can pick any other book of your choosing for a one -month free trial.
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Audible is a great service with over a hundred and fifty thousand titles in all areas of literature including fiction, nonfiction, and periodicals and so you can find virtually anything you want there
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and by going to audible .com /veritasium they know that I sent you videos for you for free.
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So I really want to thank Audible for supporting me and I want to thank you for watching.
📺 Mesmo canal
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Vocabulário e dicas de fala para esta lição
Este vídeo tem 70 frases e 811 palavras para praticar shadowing. A fala dura 5:23. O falante fala em ritmo natural, cerca de 151 palavras por minuto, próximo de uma conversa do dia a dia. 84% das palavras estão entre as 3.000 mais comuns do inglês; vale a pena estudar o restante antes de começar.
Vocabulário principal deste vídeo
15 palavras do vídeo que vale a pena aprender, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| flip verbo | /flɪp/ | virar |
| finger substantivo | /ˈfɪŋɡɚ/ | dedo (da mão) |
| spin verbo | /spɪn/ | girar, rodar |
| phenomenon substantivo | /fəˈnɒm.ɪ.nən/ | fenômeno, fenómeno |
| cane substantivo | /keɪn/ | colmo |
| cereal substantivo | /ˈsɪə.ɹɪ.əl/ | cereal |
| molecule substantivo | /ˈmɑ.lɪ.kjul/ | molécula |
| physics substantivo | /ˈfɪz.ɪks/ | física |
| rocket substantivo | /ˈɹɑk.ɪt/ | foguete |
| attract verbo | /əˈtɹækt/ | atrair |
| axis substantivo | /ˈæksɪs/ | eixo |
| rotate verbo | /ˈɹoʊ.teɪt/ | rotar, girar |
| carefully advérbio | /ˈkɛɹf(ə)li/ | cuidadosamente, cautelosamente |
| explanation substantivo | /ˌɛkspləˈneɪʃən/ | explicação, explanação |
| fiction substantivo | /ˈfɪkʃən/ | literatura de ficção, ficção |
Phrasal verbs que você vai ouvir
| Palavra | Pronúncia | Significado |
|---|---|---|
| end up verbo | terminar, acabar | |
| check out verbo | verificar, sacar só | |
| cut off verbo | /ˌkʌt ˈɔf/ [ˌkɐɾ ˈɔf] | recortar |
| look forward to verbo | ansiar por, estar ansioso para | |
| sold out adjetivo | esgotado |
Pronúncia para ficar de olho
O falante usa 11 contrações e formas reduzidas, como can't, doesn't, I'll. Diga-as na forma curta, do jeito que você ouve.
- Os sons de “sh” e “zh”: explanation /ˌɛkspləˈneɪʃən/, fiction /ˈfɪkʃən/, demonstration /dɛmənˈstɹeɪʃən/
- Palavras longas — acerte a sílaba tônica: phenomenon /fəˈnɒm.ɪ.nən/, explanation /ˌɛkspləˈneɪʃən/, virtually /ˈvɚ.t͡ʃə.wə.li/, demonstration /dɛmənˈstɹeɪʃən/, instability /ɪnstəˈbɪlɪti/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
- Grave a sua voz e compare com o original, prestando atenção a palavras como flip, finger, spin.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.