Pratica di Shadowing: GCSE Physics - Energy Stores, Transferring Energy & Work Done - Impara a parlare inglese con i video
Scegli una modalità di pratica
Ogni modalità apre una sala di pratica a schermo intero.
50 frasi
Se le frasi sono troppo corte o troppo lunghe, clicca su Edit per modificarle.
1
The most essential thing to learn from this video is that energy is never created or destroyed.
2
It's only ever transferred between different forms and objects.
3
This principle underlies loads of the physics course, but today we're just going to look at the different forms that energy can take,
4
how energy moves between them, and what we mean by the term work done.
5
Whenever energy is transferred to an object, the energy is stored in one of that object's energy stores.
6
We take a look at each of them in other videos, but to give you a basic idea, there's thermal or internal energy,
7
which is basically the heat energy trapped within an object and is related to the temperature of that object.
8
Kinetic energy, which is associated with the movement
9
or motion of an object gravitational potential energy which is the energy
10
that an object possesses
11
because of its position in a gravitational field elastic potential energy
12
such as the energy held in an already stretched spring chemical energy
13
which is held in chemical bonds magnetic energy
14
which is what holds magnets to your fridge electrostatic energy
15
which is what occasionally gives you a shock when you touch your car
16
and finally nuclear energy
17
which is what we get from breaking atoms apart now the key idea is
18
that the energy in each of these stores isn't fixed instead
19
it can be transferred from one to another
20
this could be done mechanically such as physically stretching an elastic
21
band electrically such as plugging something into a socket – by heating,
22
or by radiation, like light or sound waves.
23
When we consider a particular object, or group of objects, we can call the collection of matter a system,
24
which is just the fancy term that you need to use in physics.
25
When the system changes, energy is transferred, either between objects, or between different forms.
26
In an open system, the matter of the system can exchange energy with the so -called outside world,
27
which is just all of the matter that's outside of our system.
28
This means that an open system can lose or gain energy as it interacts with the outside world.
29
by comparison a closed system is separate from the outside world
30
so neither matter nor energy can enter or leave and
31
so even though energy can be transferred within the system the overall change is always zero
32
to understand how this actually works in practice let's take a look at a couple of examples
33
imagine we have a kettle and we fill it with water
34
when we turn it on electrical energy from the plug socket
35
flows to the heating element of the kettle where it's transferred
36
electrically to the thermal energy store of the kettle's heating element
37
which basically means
38
that the flow of electricity warms the metal heating element the heating element
39
then in turn transfers the energy over to the water's thermal energy store, and after a short while we have a boiled kettle.
40
Another way of saying energy transferred is work done, and there are two main types you need to know, mechanical and electrical.
41
Mechanical work done involves using a force to move an object, such as kicking a ball up in the air,
42
which involves energy from the chemical energy store of your leg being transferred to the kinetic energy store of the ball.
43
Electrical work, on the other hand, is done when current flows.
44
You can think of this as the energy required to overcome the resistance in the wires of a circuit.
45
To put this into practice, imagine a train that's about to cross a broken bridge.
46
In order to stop, it applies the brakes, which creates friction between the brakes and the wheels.
47
We say that the friction does work as it slows the train down,
48
because it causes energy in the wheels' kinetic energy stores to be transferred to the thermal energy stores of the surroundings things,
49
in the form of heat, which will hopefully slow down the train.
50
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!
Scarica l'app
Tutto ciò che serve per parlare fluentemente
Pronuncia con IAVoto per ogni frase
Pratica IPAPadroneggia ogni suono
VocabolarioCostruisci il tuo lessico
Gioco di vocabolarioImpara giocando
📺 Stesso Canale
B14
Parts of a Microscope & How to Use a Microscope
Daily ConversationHigh School Students
C14
GCSE Physics - Speed, Velocity, Distance & Displacement | Scalar & Vector Quantities (2026/27 exams)
Cambridge Exam PrepHigh School StudentsUniversity Students
C15
KS3 Chemistry - The periodic Table
Cambridge Exam PrepHigh School StudentsUniversity Students
C11
GCSE Biology - The Lungs & Gas Exchange (2026/27 exams)
High School Students
C1GCSE Biology - What are Stem Cells? Difference Between Embryonic and Adult Stem Cells
Daily ConversationUniversity Students
B1GCSE Maths - Alternate, Corresponding and Allied Angles - Parallel Lines Angle Rules (2026/27 exams)
High School Students
✨ Video consigliato
B23
54 frasi
Can You Define Energy?
Daily ConversationHigh School StudentsUniversity Students
C11
128 frasi
Vectors and 2D Motion: Crash Course Physics #4
Daily ConversationHigh School StudentsUniversity Students
C11
72 frasi
Overview of Fluid and Electrolyte Physiology (Fluid Compartment)
Daily ConversationUniversity Students
C11
745 frasi
WORK - HRM Lecture 08
Daily ConversationUniversity Students
C11
59 frasi
How does a Thermal power plant work?
Daily ConversationUniversity Students
C11
166 frasi
Introduction to Optoelectronics and Photonics
Daily ConversationUniversity Students
B21
109 frasi
How ELECTRICITY works - working principle
Daily ConversationUniversity StudentsWorking Adults
C11
81 frasi
Radioactive Waste - The Journey to Disposal
Daily ConversationUniversity StudentsWorking Adults
B227
13 frasi
Your Skeleton Is Electric
Daily ConversationUniversity StudentsWorking Adults
C12
131 frasi
Unit Conversion & Significant Figures: Crash Course Chemistry #2
Daily ConversationHigh School StudentsUniversity Students
C13
116 frasi
How To Become Dangerously Self-Educated (complete plan)
Daily ConversationUniversity StudentsWorking Adults
C18
156 frasi
How Quantum Batteries Break Every Rule of Charging
Daily ConversationUniversity StudentsWorking Adults
Vocabolario e note di pronuncia per questa lezione
Questa lezione di conversazione si basa sul video “GCSE Physics - Energy Stores, Transferring Energy & Work Done”. Le parole che ritornano più spesso: energy, object, transferred, store, heating. Questo video contiene 50 frasi e 696 parole da ripetere con lo shadowing. Il parlato dura 5:01. Chi parla mantiene un ritmo costante di circa 139 parole al minuto, comodo per lo shadowing. Il 84% delle parole rientra nelle 3.000 più comuni dell’inglese; conviene studiare le altre prima di iniziare.
Vocaboli chiave di questo video
15 parole del video che vale la pena imparare, con pronuncia e significato:
| Parola | Pronuncia | Significato |
|---|---|---|
| element sostantivo | /ˈɛləmənt/ | elemento |
| thermal aggettivo | /ˈθɜːməl/ | termico |
| kettle sostantivo | /ˈkɛ.təl/ | bollitore, cucuma |
| physics sostantivo | /ˈfɪz.ɪks/ | fisica |
| stretch verbo | /stɹɛt͡ʃ/ | tendere |
| mechanical aggettivo | /məˈkænəkəl/ | meccanico |
| involve verbo | /ɪnˈvɑlv/ | coinvolgere |
| plug sostantivo | /plʌɡ/ | spina |
| brake sostantivo | /bɹeɪk/ | freno |
| friction sostantivo | /ˈfɹɪkʃən/ | attrito, frizione |
| elastic aggettivo | /ə-/ | elastico, elastica |
| socket sostantivo | /ˈsɑkɪt/ | presa, zoccolo |
| shock sostantivo | /ʃɔk/ | trauma, trauma emotivo |
| wire sostantivo | /ˈwaɪɚ/ | filo, filo metallico |
| occasionally avverbio | /əˈkeɪʒənəli/ | occasionalmente, saltuariamente |
I phrasal verb che sentirai
| Parola | Significato |
|---|---|
| slow down verbo | rallentare, decelerare |
La grammatica di questo video
Le strutture che chi parla usa di più, con le parole esatte del video:
| Struttura | Nel video |
|---|---|
| Forma passiva be + participio passato — conta ciò che accade, non chi lo fa | is never created · is transferred · is associated |
| Frasi relative who / which + frase — un’informazione in più su una persona o una cosa | energy, which is · energy which is · heat, which will |
Pronuncia a cui fare attenzione
Chi parla usa 3 contrazioni e forme ridotte, come isn't, we'll, we're. Pronunciale nella forma breve, così come le senti.
- I suoni “sh” e “zh”: friction /ˈfɹɪkʃən/, shock /ʃɔk/, associate /əˈsoʊʃi.ət/, occasionally /əˈkeɪʒənəli/, radiation /ˌɹeɪ.diˈeɪ.ʃən/
- Parole lunghe — attenzione all’accento: electrical /ɪˈlɛktɹɪkəl/, mechanical /məˈkænəkəl/, electricity /ɪˌlɛkˈtɹɪsɪti/, associate /əˈsoʊʃi.ət/, occasionally /əˈkeɪʒənəli/
I suoni difficili per chi parla italiano:
- Consonante finale — senza aggiungere una vocale dopo: element /ˈɛləmənt/, physics /ˈfɪz.ɪks/, stretch /stɹɛt͡ʃ/, involve /ɪnˈvɑlv/, plug /plʌɡ/
- /æ/ — più aperta della “e”: mechanical /məˈkænəkəl/, fancy /ˈfæn.si/, trap /tɹæp/, magnetic /mæɡˈnɛtɪk/, interact /ɪn.təˈɹækt/
Come esercitarsi con questo video
- Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
- Fai shadowing frase per frase a velocità normale, ripetendo ognuna finché il tuo ritmo coincide con quello di chi parla.
- Registrati e confronta con l’originale, facendo attenzione a parole come element, thermal, kettle.
Cos'è la tecnica dello Shadowing?
Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.