쉐도잉 연습: GCSE Physics - Energy Stores, Transferring Energy & Work Done - 영상으로 영어 말하기 배우기
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The most essential thing to learn from this video is that energy is never created or destroyed.
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It's only ever transferred between different forms and objects.
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This principle underlies loads of the physics course, but today we're just going to look at the different forms that energy can take,
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how energy moves between them, and what we mean by the term work done.
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Whenever energy is transferred to an object, the energy is stored in one of that object's energy stores.
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We take a look at each of them in other videos, but to give you a basic idea, there's thermal or internal energy,
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which is basically the heat energy trapped within an object and is related to the temperature of that object.
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Kinetic energy, which is associated with the movement
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or motion of an object gravitational potential energy which is the energy
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that an object possesses
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because of its position in a gravitational field elastic potential energy
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such as the energy held in an already stretched spring chemical energy
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which is held in chemical bonds magnetic energy
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which is what holds magnets to your fridge electrostatic energy
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which is what occasionally gives you a shock when you touch your car
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and finally nuclear energy
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which is what we get from breaking atoms apart now the key idea is
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that the energy in each of these stores isn't fixed instead
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it can be transferred from one to another
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this could be done mechanically such as physically stretching an elastic
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band electrically such as plugging something into a socket – by heating,
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or by radiation, like light or sound waves.
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When we consider a particular object, or group of objects, we can call the collection of matter a system,
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which is just the fancy term that you need to use in physics.
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When the system changes, energy is transferred, either between objects, or between different forms.
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In an open system, the matter of the system can exchange energy with the so -called outside world,
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which is just all of the matter that's outside of our system.
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This means that an open system can lose or gain energy as it interacts with the outside world.
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by comparison a closed system is separate from the outside world
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so neither matter nor energy can enter or leave and
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so even though energy can be transferred within the system the overall change is always zero
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to understand how this actually works in practice let's take a look at a couple of examples
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imagine we have a kettle and we fill it with water
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when we turn it on electrical energy from the plug socket
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flows to the heating element of the kettle where it's transferred
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electrically to the thermal energy store of the kettle's heating element
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which basically means
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that the flow of electricity warms the metal heating element the heating element
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then in turn transfers the energy over to the water's thermal energy store, and after a short while we have a boiled kettle.
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Another way of saying energy transferred is work done, and there are two main types you need to know, mechanical and electrical.
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Mechanical work done involves using a force to move an object, such as kicking a ball up in the air,
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which involves energy from the chemical energy store of your leg being transferred to the kinetic energy store of the ball.
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Electrical work, on the other hand, is done when current flows.
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You can think of this as the energy required to overcome the resistance in the wires of a circuit.
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To put this into practice, imagine a train that's about to cross a broken bridge.
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In order to stop, it applies the brakes, which creates friction between the brakes and the wheels.
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We say that the friction does work as it slows the train down,
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because it causes energy in the wheels' kinetic energy stores to be transferred to the thermal energy stores of the surroundings things,
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in the form of heat, which will hopefully slow down the train.
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Anyway, that's all for today, so if you enjoyed it, then let us know down below in the comments, and we'll see you next time!
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이 레슨의 어휘와 말하기 포인트
이 말하기 레슨은 영상 “GCSE Physics - Energy Stores, Transferring Energy & Work Done”을(를) 바탕으로 합니다. 가장 자주 반복되는 단어는 다음과 같습니다: energy, object, transferred, store, heating. 이 영상에는 섀도잉할 문장 50개와 단어 696개가 있습니다. 말하는 구간의 길이는 5:01입니다. 화자는 분당 약 139단어의 일정한 속도로 말해서 섀도잉하기에 편한 속도입니다. 단어의 84%가 영어에서 가장 많이 쓰이는 3,000단어에 속합니다. 나머지는 연습 전에 미리 확인해 두세요.
이 영상의 핵심 어휘
영상에 나오는 익혀 둘 만한 단어 15개를 발음, 뜻과 함께 정리했습니다.
| 단어 | 발음 | 뜻 |
|---|---|---|
| element 명사 | /ˈɛləmənt/ | 요소 |
| kettle 명사 | /ˈkɛ.təl/ | 주전자 |
| physics 명사 | /ˈfɪz.ɪks/ | 물리학, 물리 |
| stretch 동사 | /stɹɛt͡ʃ/ | 당기다, 늘이다 |
| plug 명사 | /plʌɡ/ | 플러그 |
| brake 명사 | /bɹeɪk/ | 브레이크, 제동기 |
| friction 명사 | /ˈfɹɪkʃən/ | 마찰 |
| socket 명사 | /ˈsɑkɪt/ | 소케트, 콘센트 |
| shock 명사 | /ʃɔk/ | 충격, 쇼크 |
| wire 명사 | /ˈwaɪɚ/ | 철사 |
| associate 명사 | /əˈsoʊʃi.ət/ | 제휴자, 조합원 |
| occasionally 부사 | /əˈkeɪʒənəli/ | 가끔 |
| principle 명사 | /ˈpɹɪn.sɪ.pəl/ | 원리, 원칙 |
| trap 명사 | /tɹæp/ | 덫, 올가미 |
| overcome 동사 | /ˌəʊ.vəˈkʌm/ | 극복하다, 이겨내다 |
이 영상의 문법
화자가 가장 많이 쓰는 문형을 영상 속 실제 표현과 함께 정리했습니다.
| 문형 | 영상 속 표현 |
|---|---|
| 수동태 be + 과거분사 — 누가 하는지보다 무슨 일이 일어나는지에 초점 | is never created · is transferred · is associated |
| 관계절 who / which + 절 — 사람이나 사물에 대한 추가 정보 | energy, which is · energy which is · heat, which will |
주의할 발음
화자는 isn't, we'll, we're 같은 축약형과 약화된 형태를 3번 사용합니다. 들리는 대로 짧게 발음하세요.
- “sh”와 “zh” 소리: friction /ˈfɹɪkʃən/, shock /ʃɔk/, associate /əˈsoʊʃi.ət/, occasionally /əˈkeɪʒənəli/, radiation /ˌɹeɪ.diˈeɪ.ʃən/
- 긴 단어 — 강세 위치에 주의: electrical /ɪˈlɛktɹɪkəl/, mechanical /məˈkænəkəl/, electricity /ɪˌlɛkˈtɹɪsɪti/, associate /əˈsoʊʃi.ət/, occasionally /əˈkeɪʒənəli/
한국어 화자가 어려워하는 소리:
- /f/ — ㅍ(/p/)으로 바꾸지 말고 윗니를 아랫입술에 대기: physics /ˈfɪz.ɪks/, friction /ˈfɹɪkʃən/, fancy /ˈfæn.si/, physically /ˈfɪz.ɪ.kli/
- /v/ — ㅂ(/b/)과 구별하기: involve /ɪnˈvɑlv/, overcome /ˌəʊ.vəˈkʌm/, gravitational /ˌɡɹævɪˈteɪʃənəl/
- /z/ — ㅈ이 아니라 성대를 울리는 /s/: physics /ˈfɪz.ɪks/, physically /ˈfɪz.ɪ.kli/, possess /pəˈzɛs/, surroundings /səˈɹaʊndɪŋz/
이 영상으로 연습하는 방법
- 먼저 말하지 않고 영상을 끝까지 듣고 모르는 단어를 적어 둡니다.
- 보통 속도로 한 문장씩 섀도잉하고, 화자의 리듬과 맞을 때까지 반복합니다.
- 자신의 목소리를 녹음해 원본과 비교하고, element, kettle, physics 같은 단어에 특히 주의합니다.
쉐도잉이란? 영어 실력을 빠르게 키우는 과학적 방법
쉐도잉(Shadowing)은 원래 전문 통역사 훈련을 위해 개발된 언어 학습 기법으로, 다언어 학자인 Dr. Alexander Arguelles에 의해 대중화된 방법입니다. 핵심 원리는 간단하지만 매우 강력합니다: 원어민의 영어를 들으면서 1~2초의 짧은 지연으로 즉시 소리 내어 따라 말하는 것——마치 '그림자(shadow)'처럼 화자를 따라가는 것입니다. 문법 공부나 수동적인 청취와 달리, 쉐도잉은 뇌와 입 근육이 동시에 실시간으로 영어를 처리하고 재현하도록 훈련합니다. 연구에 따르면 이 방법은 발음 정확도, 억양, 리듬, 연음, 청취력, 말하기 유창성을 크게 향상시킵니다. IELTS 스피킹 준비와 자연스러운 영어 소통을 원하는 분들에게 특히 효과적입니다.