- Hey, I'm Dianna. You're watching Physics Girl.
I'm stuck inside, so I've challenged myself
to do 20 experiments in five minutes.
That's four experiments per minute,
which works out to about 15 seconds per experiment.
I have not been able to do it in any of the dry runs,
but I have hope.
All of these experiments are
with stuff you can find at home.
You should definitely try them.
Some of them require adult supervision,
but they're all really fun.
Okay.
Let's go.
The first experiment is a cloud in your mouth.
So you click your tongue like this (clicks tongue)
but you do it with your mouth full of air,
and then you pressurize it, okay?
Like this.
Did you see it? Yes, I hope so.
Okay, the next one we're gonna do
use the principle of static electricity,
rub a balloon against your hair,
and then you can move water
because there's a bunch of charges in the water.
It works really, really well.
That is awesome. Okay.
Over here, I've got a hot pan that's been heating up
for a while, and I wanna put some water on it
and the water does not act normal.
It rolls around like little balls.
It's kind of like Pac-Man.
The bigger ones eat the smaller ones.
It's awesome.
Leidenfrost effect. Google it.
The next one. I've got a can here.
I'm gonna put some safety goggles on for this one.
I have a can that's been heating up for a while.
There's water in it.
I'm gonna turn it over into this ice water.
(can pops) Ah! And it crushes
because of the pressure of all the atmosphere.
Oh, I still need my safety goggles for the next one.
This can is closed.
I've got a Sharpie here, and I'm gonna just rub
with some pressure along the edge over and over.
(can pops) Ooh, until it pops open!
Love that one.
Okay.
The next thing we've got the land of fire over here.
So we've got an experiment with a candle,
a bunch of water around it.
I'm gonna put this jar over that
and we're gonna wait a second to see what happens.
But first I'm gonna blow out this candle
and you can see that you can relight the flame.
Oh no, I think I blew it too hard.
I'm losing time.
Oh, check out this one in the meantime.
This one's going out,
and the water level goes up, because the air inside shrinks.
Let's try this one again.
All right, you can relight the candle.
Yes! Because, but I'm gonna put it back out
with baking soda and vinegar.
I'm not gonna pour the vinegar on it,
but we've all done this experiment.
You create a bunch of carbon dioxide bubbles
when you combine baking soda and vinegar.
And carbon dioxide has the benefit that it is not oxygen,
so you can pour out fire.
Did you see that?
It didn't even look like I did anything,
and the flame went out.
I am losing time.
Okay, the next one, if you take a tea bag,
like cheap Lipton tea, whatever, dump it out.
You can make these little cylinders, light them on fire,
and then as they heat up-
Oh no! (laughs)
As they heat up,
they get lighter and lighter, and then they start to fly,
because hot air loves to rise.
Over here I've got a bunch of needles
pointing at this magnet,
and they're all attached to strings.
I'm gonna heat these up. Oh shoot!
No! No!
Okay, oh, we're still good. We're still good.
We got a couple.
I'm gonna heat these needles up.
And as I do,
they're gonna lose their magnetism,
because they get above- - Two minutes remaining
Two minutes? Oh my God.
They get above the temperature
where metal stays magnetizable,
and they...
Get in close on that. That's really cool.
They... Oh, come on. Good, they fall.
Yes! Yes, okay.
Next one. You can balance a ping pong ball
on a stream of air.
This is the challenge island.
Right here we've got some interlocked forks.
I'm gonna take a toothpick and stick that through
and use the principle of center of gravity
and get the center of gravity below these balancing points.
And I can
balance the forks. Amazing!
The next challenge.
I'm gonna take this regular string and pour some water
with food coloring in it from this cup,
using the properties of surface tension,
down the string
all the way to the other cup.
I don't have time to do the entire cup though.
You get the point. It's super cool.
If I take a hard-boiled egg, not a soft boiled egg.
- One minute left. - Oh my God. One minute.
And I spin it fast enough. Ho!
I can get it to stand up on its end. Amazing!
Okay. Now take a card with a cup, turn it over.
It can hold up the cup. Excellent!
Next one.
Polarizing sheets.
You can look through them and see the properties
of corn syrup
and how they've got amazing optical properties.
Take an Alka-Seltzer tablet,
put it into some water with some oil on top
and you can make your home lava lamp.
While you watch that, I'm gonna take this egg
and show you the property of impulse,
which is that, if I throw an egg,
it'll get caught by something with give.
But if I throw it with something that would not give...
(egg crashes)
(laughs) Someone's gonna have to clean that.
Okay, in here I've got a non-Newtonian fluid.
This acts like a solid, but then it'll act like a liquid
as soon as I, as soon as I let it flow-
What are we at? What are we at?
- Five minutes. - Oh my gosh!
Five minutes. No!
We have one experiment.
We have one experiment left, one experiment left.
Okay. This one uses the principle of inertia.
We've got these eggs here.
They want to stay exactly where they are.
Okay, I have one shot at doing this.
I've never actually tried this before,
but I'm gonna hit it.
We don't have the luxury of doing a countdown.
We're just gonna go for it.
Here we go. Okay.
(eggs clank)
Yes!
(people cheer)
All right! Oh, thank you guys.
(all laugh)
- Nice.
- That that, science.
Yeah!
Woo! - You just did 20 science
experiments in five minutes and 20 seconds.
How do you feel?
- I feel amazing. I feel good.
I feel, I feel a little, a little sad
that I missed it by 20 seconds!
And it felt good to have an amazing team
supporting the production.
Hey! It's still me. Dianna.
I just want to take a moment,
because I have quite a few of those,
to thank my patrons for supporting me
and helping me continue to make science content
during uncertain times.
So if you want to join the physics-loving community
over there, head over to patreon.com/physicsgirl,
If you're stuck at home too, tweet me your attempts
at any of these experiments, or really any experiments
(that can be interpreted loosely)
with the hashtag #stuckAtHomeScience.
And if you can beat those 20 experiments with a faster time,
well, the first person to do that definitely
deserves a shout out in my next video.
There's a couple more DIY experiments to try
in the description of this video, and that's it.
I know you're waiting for it.
Happy, healthy physics-ing.
(upbeat music)