Pratica di Shadowing: Revealing 5 Secret Magic Tricks With Science - Impara a parlare inglese con i video
Creazione lezione...
1
Today we're gonna be teaching you five magic tricks you can do yourself at home to impress your friends.
2
Actually even better than magic tricks because they use science like a levitating orb.
3
Oh Emma needs her ladle back.
4
These are tricks that I've never seen before
5
and they're gonna be performed by our former middle school science teacher and even former-er middle school magician, Science Bob Flugfelder.
6
Here we go.
7
Trick number one involved nothing more than a metal ring, Bob's finger and some uncomfortable prolonged eye contact.
8
Ready?
9
Yeah.
10
What the heck was that?
11
There's no hinge on here.
12
Let me just try it.
13
One, two...
14
Okay, maybe there's...
15
Oh no!
16
So this is a trick to use as persistence of vision.
17
We have build box toys that utilize persistence of vision.
18
That's true.
19
The coin spinner.
20
You spin the coin and it looks like Saturn has rings, but really it's just a circle on one side and rings on the other.
21
I'm literally just pushing my finger.
22
So at one point my pinky looks like that, but you don't see that.
23
You can do it just right.
24
One, two, three.
25
Wow.
26
Resistance of vision relies on the fact
27
that your eyes can only send a limited number of visual pictures to the brain each second.
28
Because the pinky bend happens so fast, there's a good chance your eyes never sent that part of the trick to your brain.
29
Which means your brain has to assume the ring just went through your finger, even though it knows that's really not possible.
30
And that's how you can pull out this mind-blowing trick like I do.
31
Huh?
32
Huh?
33
Nate's laughing, so I don't think it worked after maybe a bit more practice.
34
Oh dang it, stop laughing!
35
For trick number two, Bob threw down not one, not two, but three cups, and then filled just one of them with water, at which point he gave me a challenge.
36
I will scramble up the cup, try to remember which one has the water in it.
37
Easy.
38
In this one, here we go, and mixing, and mixing, and mixing, and mixing, and mixing.
39
Okay, one, two, or three.
40
Easy, one.
41
Let's see if you are right.
42
You are, hopefully you got that at home.
43
That means we're going to the next level.
44
It's in this thinner one.
45
Okay, yeah.
46
Here we go, and there we go, there we go.
47
Mixing, mixing.
48
Let's do that.
49
One, two, three.
50
I feel like that was even easier, Bob.
51
Number two, thank you very much.
52
If you're right, you are.
53
One more time, one more time.
54
It's in this one.
55
Okay.
56
Going, going, going, going.
57
All right, one, two, or three.
58
Two!
59
Let's see if you're right.
60
What?
61
One or three.
62
Three?
63
Are you right?
64
No. So here's the weird thing, there never was any water.
65
Believe it or not, the science behind this is the same science that's used in diapers.
66
Whoa.
67
You need to get your hands on some diapers.
68
Go and say, hey, can I borrow a diaper?
69
Yeah, that's not weird.
70
You will immediately see all this white powder coming out of that.
71
And this white powder turns out to be a liquid absorbing polymer, which explains why it's in diapers.
72
So Bob grabbed some clear cups to show me the secret
73
was putting a little bit of the polymer into just one of the cups.
74
And then after transferring water between the two empty cups, poured it into the polymer cup.
75
After which...
76
That water absorbing polymer starts going to work.
77
And after just a little bit of time, no water in there.
78
No water in that one and no water in that one.
79
Whoa.
80
That is wild. And magic.
81
And after a quick clean up of the mess Bob's diaper left, we got to trick number three, which involved a big bottle of water containing a tiny packet of ketchup.
82
Bring your hand near it and it will drop.
83
It takes the warmth from your hand and it will change the density.
84
There it is.
85
Bob, that's not a valid explanation.
86
Are you saying I was lying?
87
Yes, I'm saying you were lying.
88
Traditions lie a lot.
89
It has nothing to do with the heat from your hand.
90
Totally made that up.
91
What it does have to do with is water pressure.
92
So if I want this to sink, all I gotta do is actually squeeze this.
93
Almost imperceivable squeeze will make that go down.
94
This is called the Cartesian diver.
95
Water can't compress, but the little air bubble inside of the ketchup can compress.
96
So when I squeeze this, that changes the density and that causes it to sink until I release it.
97
So that means the combination of the ketchup, the packet and that air bubble is really close to the density of water.
98
It's almost neutrally buoyant, right?
99
Almost.
100
It turns out there's a secret ingredient to this trick.
101
Because if you put the ketchup packet in regular water...
102
You can see how this one's not floating the way you eat it.
103
Yeah, it's not really floating.
104
So you just add some salt and shake it up.
105
Yeah.
106
It's gonna increase the density of the water.
107
Sure.
108
Oh, now it definitely floats.
109
And now it's floating.
110
See, there it goes.
111
Wow.
112
And because salt water is denser than regular water, ketchup will float on it as long as the air bubble stays big.
113
But when you squeeze the bottle, water pressure pushes all those little molecules of air in the bubble closer together.
114
And that slight change in volume increases the density of the ketchup packet compared to the water around it, and just like magic, the packet sinks.
115
Force.
116
Now that Bob had busted out the force, it was time for trick number four, where he was going to show off further Jedi powers using a balloon,
117
a ring cut from a plastic bag, and his own hair.
118
What this is doing is putting a negative charge on it.
119
And it's making your hair look cool.
120
And then, if all goes well, they will.
121
Isn't that cool?
122
Oh, it's a balloon halo!
123
Isn't that neat?
124
You don't need to be a Jedi to pull this off, thanks to electrons.
125
All materials in the world contain tiny particles called electrons, which have a negative charge.
126
Certain materials, like plastic bags and wiffle ball bats, are able to pick up negative charges from other materials, like your hair, which gives away the charge easily.
127
But it turns out that negative charges absolutely don't like hanging out together, And so they'll repel away from each other just like negative sides of a magnet repel each other.
128
And so if one of those objects with a negative charge is light enough, like say a ring cut from a plastic bag,
129
the repelling force is strong enough relative to gravity to push it away and make it float.
130
Oh, it's like a UFO.
131
Can I try?
132
Yeah.
133
Do I gotta use your hair?
134
Sure.
135
Cut!
136
Oh yeah!
137
There ya go.
138
No way.
139
I can move it up and down.
140
I go to left, I go forward, I come back.
141
I am an actual wizard.
142
That or its electrons repelling each other.
143
And feel free to get creative with the shapes you cut out.
144
It's a jellyfish.
145
Alright jellyfish, we're going for a walk.
146
After taking a brief intermission so Bob could tend to my jellyfish thing.
147
My face!
148
We moved on to the next trick which only involves a pen and a water bottle.
149
This doesn't always work.
150
I'm gonna try it without the cap this time, see if it works better.
151
Alright, here we go.
152
One, two, three.
153
Whoa!
154
Check it out.
155
What the heck just happened?
156
Okay, if you squeeze it, that must be it.
157
You squeeze it.
158
Wait, nothing's happening.
159
Bob!
160
So this was a brain trick.
161
Let's talk a little bit about light diffraction.
162
This works because the sides are round.
163
And so this acts as a lens.
164
And so, when we tip it over, I can't see that pen at all.
165
Then we bring the pen up, I can turn it.
166
Your eyes are now on the pen.
167
So you're not even thinking about one being behind.
168
Now I take advantage of light diffraction the other way.
169
So I can slip this away and all of your attention is on that.
170
But let's see if the final trick could beat it, which started promisingly with another balloon.
171
Now, if I can put this very pointy skewer through this balloon without popping it, will you buy me an ice cream?
172
I'll buy you 12 ice creams, Bob.
173
Excellent.
174
Alright, here we go.
175
Whoa.
176
What?
177
Here we go.
178
What the heck?
179
Maybe I'll go chocolate?
180
What the heck?
181
That feels like it shouldn't be possible.
182
True, because your brain says, hey, if there's a hole in something, it's probably leaking.
183
Yeah.
184
But now we're using, once again, the power of the polymer.
185
Can I make a guess?
186
I noticed you didn't fully fill this up.
187
Correct.
188
So it's like the rubber's a little bit thicker, and it almost creates a seal.
189
You also poked it at the bottom, where I know the rubber's thicker.
190
Yeah.
191
And then if you don't want to spoil it, you can just take it out.
192
There you go.
193
They never have a chance to check it out.
194
Bob, show me this trick could also be performed with a big freezer bag and an absolute rainbow's worth of colored pencils.
195
Pick whatever spot you want.
196
Really?
197
Relatively fast and confident.
198
I can be fast and confident, Bob.
199
Okay.
200
The way you stepped to the side, though, that was not a confident sidestep.
201
I'm not moving.
202
Alright, here we go.
203
Three, two, one.
204
Pukka!
205
Spoiler alert, this was fun.
206
That's trippy.
207
It's because your brain thinks if something is full of water and it has a hole in it, it's supposed to leak.
208
The polymers are sealing that off.
209
In fact, oh no. Maybe it was too fun.
210
Oh no!
211
We've tried to leak!
212
Alright, so that means I moved a little on that one.
213
For our viewers, see how many of these you can get in a single bag without that.
214
Tag us at Crunch Labs.
215
Winner gets 12 ice creams.
216
Alright, well there's a bunch of science tricks that are better than magic, and now I have a final science trick of my own.
217
Back to work, Bob.
218
Yes, sir.
📺 Stesso Canale
✨ Video consigliato
B21
133 frasi
I Tricked A Musician To Play To 5,000 Fans (feat. bbno$)
TeensDaily ConversationHigh School Students
B1345 frasi
Fractions Made EASY!
Daily ConversationHigh School StudentsUniversity Students
B11
228 frasi
Improve your spoken English in 10 minutes.
Daily ConversationHigh School StudentsUniversity Students
B26
135 frasi
INTERMEDIATE ENGLISH STORY 💫 The Magical Secret✨ B1 - B2 | Level 3 - 4 | BRITISH ENGLISH SUBTITLES
British AccentTeensDaily ConversationHigh School Students
B21
201 frasi
This Ball is Impossible to Hit
American AccentBusiness EnglishDaily ConversationHigh School Students
B12
151 frasi
Bradley Cooper Plays '5 Second Rule'
TeensDaily ConversationHigh School Students
B11
5 frasi
This is how you REALLY do it! #makeupchallenge #makeup #grwm
TeensDaily ConversationHigh School Students
B21
237 frasi
Master Cooking In Under 20 Minutes
Business EnglishDaily ConversationUniversity Students
B24
103 frasi
1st place Egg Drop project ideas- using SCIENCE
American AccentDaily ConversationHigh School StudentsUniversity Students
B21
396 frasi
Training W/ Real Life Vampire (Anti-aging)
Business EnglishDaily ConversationUniversity Students
B15
414 frasi
I Tested Weird Al FOOD HACKS!
TeensDaily ConversationHigh School Students
Vocabolario e note di pronuncia per questa lezione
Questo video contiene 218 frasi e 1767 parole da ripetere con lo shadowing. Il parlato dura 8:59. Chi parla va veloce, circa 197 parole al minuto: aspettati suoni legati e ridotti. Il 82% delle parole rientra nelle 3.000 più comuni dell’inglese; conviene studiare le altre prima di iniziare.
Vocaboli chiave di questo video
15 parole meno comuni del video, con pronuncia e significato:
- trick /ˈtɹɪk/ (sostantivo) — inbroglio. Something designed to fool, dupe, outsmart, mislead or swindle.
- float /fləʊt/ (verbo) — galleggiare. To be supported by a fluid of greater density (than the object).
- squeeze /skwiːz/ (verbo) — spremere, stringere. To apply pressure (to something) from two or more sides at once.
- polymer /ˈpɑ.lɪ.mɚ/ (sostantivo) — polimero. A long or larger molecule consisting of a chain or network of many repeating units, formed by chemically bonding together many identical or similar small…
- density /ˈdɛn.sə.ti/ (sostantivo) — densità. A measure of the mass of matter contained by a unit volume.
- packet /ˈpæk.ɪt/ (sostantivo) — pacchetto, pacco. A small pack or package; a little bundle or parcel
- bubble /ˈbʌbəl/ (sostantivo) — bolla. A spherically contained volume of air or other gas in a liquid, commonly a soapy liquid.
- heck /hɛk/ — diamine. Hell.
- balloon /bəˈlun/ (sostantivo) — palloncino. An inflatable buoyant object, often (but not necessarily) round and flexible.
- finger /ˈfɪŋɡɚ/ (sostantivo) — dito, dita. A slender jointed extremity of the human hand, (often) exclusive of the thumb, and the corresponding part, irrespective of including a thumb, in many other…
- sink /ˈsɪŋk/ (verbo) — affondare, sprofondare. To descend or submerge (or to cause to do so) into a liquid or similar substance.
- leak /liːk/ (sostantivo) — falla, perdita. A crack, crevice, fissure, or hole which admits water or other fluid, or lets it escape.
- thick /θɪk/ (aggettivo) — spesso. Relatively great in extent from one surface to the opposite in its smallest solid dimension.
- seal /siːl/ (sostantivo) — timbro. A stamp used to impress a design on a soft substance such as wax.
- powder /ˈpaʊ.dɚ/ (sostantivo) — polvere. The fine particles which are the result of reducing a dry substance by pounding, grinding, or triturating, or the result of decay; dust.
I phrasal verb che sentirai
- turn out (verbo) — risultare. To end up; to result.
- come back (verbo) — tornare. To return to a place.
- cut out (verbo) — smetterla, finirla. To refrain from (doing something, using something etc.), to stop or cease (doing something).
- give away (verbo) — regalare, dare via. To make a gift of (something).
- go for (verbo) — tentare, provare. To try for, to attempt to reach.
- go through (verbo) — attraversare. To travel from one end of something to the other.
- pick up (verbo) — tirare su, sollevare. To lift; to grasp and raise.
- show off (verbo) — vantare, vantarsi. To exhibit the best attributes of something.
Pronuncia a cui fare attenzione
Chi parla usa 35 contrazioni e forme ridotte, come don't, gonna, I'm. Pronunciale nella forma breve, così come le senti.
- I suoni “th”: thick /θɪk/, thin /ˈθɪn/, warmth /wɔɹmθ/
- I suoni “sh” e “zh”: explanation /ˌɛkspləˈneɪʃən/, shake /ˈʃeɪk/, jellyfish /ˈd͡ʒɛliˌfɪʃ/, diffraction /dɪˈfɹækʃən/, intermission /ɪntɚˈmɪʃən/
- Parole lunghe — attenzione all’accento: explanation /ˌɛkspləˈneɪʃən/, uncomfortable /ʌnˈkʌm.fɚ.tə.bl̩/, ingredient /ɪnˈɡɹiːdi.ənt/, intermission /ɪntɚˈmɪʃən/
Come esercitarsi con questo video
- Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
- Inizia a velocità 0,75×, fai shadowing frase per frase e torna alla velocità normale quando diventa facile.
- Registrati e confronta con l’originale, facendo attenzione a parole come trick, float, squeeze.
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 | be performed · is called |
| Present perfect have/has + participio passato — un’azione passata che conta ancora adesso | I've never seen · We've tried |
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.