-Give it up for our resident
science expert, Kevin Delaney, ladies and gentlemen.
[ Cheers and applause ] Good to see you, buddy. Thank you so much. We love it when you come by. -Oh, it's always good
to be here. -Congratulations. You just
finished the second season of your show "Street Science." For anyone that hasn't seen it,
where can they go to watch this? -Oh, you can go to
sciencechannel.com or the Science Channel Go app and you can watch
all the episodes. The team is here tonight, and we have a bunch of
cool stuff for you. We do explosions, car crashes,
all kinds of cool stuff. -You do? Yeah.
-Chemistry, physics. -What are we doing tonight? -Okay, so we're starting with
a light bulb. So do you know
how a light bulb works? -Yes, I think --
there's like trapped -- there's a gas in there trapped? -Yes, that's right. Exactly.
Exactly. So, the electricity --
[ Laughter ] He was right. He was right.
-Yeah, this is very good. -Don't laugh at him.
-Yeah. -So, the electricity passes
through into a tungsten filament that's inside this light bulb. The tungsten heats up, and it gives off
a really bright, white light. White hot.
-Yep. -Which is hotter than red hot,
so it's a real hot light. So, do you know who invented
the light bulb, by the way? -Thomas Edison? -He wishes he invented
the light bulb. No. A lot of people worked on
the light bulb at the same time. Joseph Swan is the first one,
but he and Edison... -Really? -...eventually worked together,
a little bit. -A little truth. -But it didn't work very well. Because he didn't know
what you know, about a nonreactive gas inside
of the bulb, at the time. So his light bulb burnt out
pretty quickly. So we have a couple of
light bulbs here that don't have
the glass globe on top. So go ahead.
You can turn this one up. Turn it all the way up.
Just ramp it up to 100. Go all the way. -I love this thing, by the way.
-And watch what happens. -Here go.
-Our light bulb will light up. And that filament's burning
really, really, really hot. -Yep. -And the oxygen in the air
reacts with the tungsten, creating tungsten oxide
and it -- -Kevin!
[ Laughter ] -Over here.
-Kevin, where are you, buddy? -Over here. -Okay, Kevin,
thank you very much. -And it goes out.
It goes out. So that's what happened with
Joseph Swan. It didn't stay lit
for very long. -The tungsten?
-So a lot of people -- Yeah. So Edison figured out the gas,
I guess. And so we have
a nonreactive gas here, except it's in its liquid form. This is my old friend
liquid nitrogen. -Yes! We love liquid nitrogen
on our show. Yeah. -So we're going to make a liquid
light bulb, using that nitrogen. So, all right, I'm going to dunk
this slowly in here. Now you can kind of turn up
the light again. And we can dim the lights down. -I'm going to put
an electrical charge... -It's not water.
-...to your hand. -It's nitrogen. So it's not
going to electrocute me, I hope. We'll find out.
All right, ready? -You were always a great guest,
dude, I got to say. -Thanks, man. It's been good.
It's been good. Go ahead and turn it on. [ Cheers and applause ]
There we go. -Look at that! -So now we have
a nice liquid light bulb. -Now, why is that working? There's no -- There's no oxygen? -There's no oxygen. So it's nitrogen, so our light can burn
really, really brightly. But you guys can bring
the lights back up. But when we take it back out
into the air, all that oxygen... -Wow! Yeah, that's what
I'm talking about! Here we go. [ Cheers and applause ] All right, now what else we got?
-All right. So, summer's a ways away, right?
-Yep. -But, you know, we brought
the beach to you. We have a big old tub of sand. -Hey, all right.
-So let's go into the tub. [ Laughter ] -If I had a nickel...
-Yeah. [ Laughter ] So, Jimmy, have you ever stood
on a mound of sand before? -With a grown man? Uh, yeah, I don't know.
It seems familiar, of course. -It's pretty nice. Pretty nice.
-Is this just sand? -This is just sand now.
-Okay. -You guys can turn on the sand. -Wait, what do you mean
turn on the sand? [ Audience ohs ] -So what we've done here is
something called fluidization. So we pumped gas, nitrogen gas,
into the sand. [ Laughter ] So what it's doing is kind of
moving those sand grains apart. -I'm melting!
I'm melting! Wait, what is this? For real?
This is just regular sand? -Yeah, it's just regular sand
with gas moving through it. With nitrogen moving through it. So what it does, is it reduces
the friction between the particles of sand
and the sand kind of fluidizes and becomes
more like a fluid than like that granular solid.
-Look at that! -So, watch. We have all these
toy -- look at all these toys. You can play with the duck.
Look at him go! Look, you just push him down,
and he comes back up. How 'bout that?
-This feels good. -Are you feeling --
Is it going -- -It's pretty fun. We can walk -- We can walk
around a little bit. Now, you guys, you can turn off
the sand now. And now go ahead and get up. No, we're stuck.
That's our show, everybody! [ Laughter ] I'm the host now!
-Oh, my God. -No, I'm just kidding.
-Wowzers. -Come on up. Just lift up.
-Yeah. -There we go.
-Oh, my gosh. -There we go.
-That's awesome! How rad was that?
-Pretty fun. -And it's all up
in my undies, too. -Fluid is great.
[ Laughter ] -It's fantastic. -All right.
-All right. What else you got? -So now, I have another light
for you. -Yeah, so far there hasn't been
any explosions. -Well, don't worry. So, I have a laser here, okay?
-Okay. -So, a laser is a different kind
of a light source. White light contains all the
colors of the spectrum, right? -Okay.
-So a laser just concentrates one frequency
to create one color, right? A really, really concentrated
beam of light. -Okay.
-Okay? -Or kind of like a magnifying
glass with the sun where you're burning ants
or something? -Ants? You burned ants? -Sure. Bees, stuff like that. -That's cruel.
I just burned leaves. We had leaves. Ants. -I didn't know.
No, I never did that. I just read about it in a book.
[ Laughter ] -So, darker colors absorb more
energy than lighter colors do, so the black balloon is going to
absorb all the light from the laser,
if you fire it at that. So go ahead, and you want to
extend your arm. Go ahead.
-Okay. -Here you go.
And how do you do the remote? Do you do it this way
or this way? -No, I'm a thumb guy.
-Okay, go ahead. So just hold and then fire it --
hold it, hold it. There you go. There we go.
-Kevin, gosh! -You okay?
-Yes. But that was just
a balloon popping. But even that scared me. -That's right. -Yeah, you didn't tell me that
was going to happen. -Now the white balloon won't
absorb that light as well as
the darker colored balloon. So go ahead
and fire it at that one. -What does that mean?
Is it going to explode more? -Let's find out. No. It's not. You can turn it off. -Really?
-There you go! -Wait, that's your --
that's your big ending? -No, we have more balloons.
Open the curtain. You can leave the laser here. -Ooh. See, I knew you had
something going on. All right.
What is -- What's going on now? -We're going to play
a little game. We're going to see
who can pop more balloons. Or who can pop them faster
anyway. So you'll want to put on
your safety goggles. -What do we have here? -Okay, we have white balloons
with black targets. So the black targets should help
us pop those balloons. And everybody in the audience, you're going to want to cover
your ears. And you don't want try this at
home with your at-home lasers. [ Laughter ]
Yeah, okay. So, are you ready? -What do I just press
this button here? -On the count of three,
you want to press it and hold it until all the balloons
are popped. -Are you going to wear
your safety goggles? -I have glasses on.
-Sorry. -I'm a nerd.
[ Laughter ] Okay, ready? -Kevin, here we go.
Are you ready? You tell me when.
When are we doing? -One.
-All right, yep. -Two. Three. [ Audience gasping ] I think I won. -Barely.
-Barely. There you go! You popped it.
[ Cheers and applause ] -All right. Can we see that again
in slow motion? Oh! Oh, my goodness! -That's pretty good.
-Oh, my goodness. -Kevin Delaney, everybody! [ Cheers and applause ] -I forgot to mention --
the slow motion reminded me. There was hydrogen
in all of those balloons. -Yeah, thank you for telling me
that right there. I appreciate it.
Kevin Delaney, everybody!
