Water (what are) you guys doing all the way down there? It's time to talk about today's ball de jour.
The newest ball in my collection
I'm very very excited to start using it.
It is a density ball
[MUSIC]
It's definitely floating
The water in the aquarium has a temperature and that temperature is about twenty-two point five right now
but I'm about to change that by pouring in a
Big old pot of steaming hot water. Pour it in like this. I don't want the currents to affect the ball.
There's a liter of steaming hot water, and...
oh oh bye-bye ball-y!
Clunk
The temperature will continuously change as the water mixes and its temperature changes
But it's clearly gotten warmer
and the ball has clearly sunk because of that.
That's because a density ball is precisely made to have a density that is less than cool water
But more than warm water; cool and warm
I'm not saying hot and cold because we didn't change the temperature of the water in here that much
But that's all it took for the buoyant effect on this ball
To be altered enough that it would sink or they would... In fact, let's make it float right now. I've got
Um
I wanted to get big ice packs, but someone forgot to put those in the freezer
So instead we're gonna use these bags of frozen fruit that belonged to Jake, he's not in the office today
So just don't tell him that I got them all wet with my ball
But these are extremely cold these are frozen, and they should drop the temperature of the water in the aquarium
And as that water chills down it becomes denser
And the denser the water is the stronger the buoyant force it exerts on the density ball will be and the ball should float again.
I'm going to put one more frozen juice in.
Water takes a lot of time to cool and to warm
Unless you use an enormous amount of energy, so this isn't the fastest experiment in the world
but watch that temperature gauge
It should start dropping as we chill the water
So, objects float or sink based on the ratio between their weight force and the buoyant force the fluid that they're in exerts on them.
Buoyant force comes from the fact that water further down in the aquarium has a higher pressure because of the weight of all the water
Above it so if the pressure the actual 'oomph' the molecules have crashing into you at the bottom is
stronger than at the top well that means you're gonna be pushed up.
All of us are pushed up
We're even pushed up by the fact that air pressure is greater down at our feet.
But if that push up if that buoyant force up is stronger than your weight force down
You'll float but by raising the temperature of the water in this aquarium by pouring in that almost boiling water
We were able to make the water less dense that dropped its buoyant force
And it was no longer able to support the density ball so the ball fell
But if we cool the water down it should become more dense its buoyant force on the ball should increase and the ball should float up
It's just a matter of time.
These frozen juice bags are not doing the job very quick
Let's see what temperature are we at now.
Twenty three point six
and this water began at twenty two point five, right?
We've got more than a degree to go
But we're gonna sit here, and we're gonna watch this happen in real time. Whether you like it or not
Just kidding. We'll do a time lapse
So we're getting there our temperature is now twenty two point...
Twenty two point six and twenty two point five is where we were when it was floating on the top
obviously our thermometer is
Sampling the water temperature over here, but the ball is over there, but we have proven that these frozen bags of fruit
Or ice I don't even know they don't belong to me, but I still do what I want with them
We've proven that they're very cold, and they're lowering oh
Oh, oh, I feel like I should maybe get a little phone video of it finally surfacing.
Hey everyone say hi.
We're spending our Monday watching balls move
Yeah, let's just take these out
This is a fresh egg we just bought these today they are
Totally ready to be eaten. Let me put one in water, and we'll see if it sinks or floats
Okay, it sinks the buoyant force the water puts on it isn't enough to lift up its weight force
But we're not done because way back in January, so we're talking like almost five months ago
we had some eggs that were expired and I said let's keep them and
I wrote Michael's...
Ohhh...these are bad eggs
these have been bad for a long time but
Take a look. I'll pull one out here. Oh
Doesn't look that bad
If you didn't have a functioning nose you might go ahead and eat this
So how do you know if an egg is bad or not?
Well put it in water if it's a good egg. It'll probably sink, but if it's a bad egg
It'll probably float why would that be why is the density of the rotten egg changed? Here's another rotten egg?
There's another rotten egg and
Then let's put in some fresh eggs
We're not gonna mix up the two because the good ones sink and the bad ones float.
They're different colors but the color isn't affecting the buoyancy. So another good egg and
Let's put in let's put in two more bad ones and you may as well put these to use
Anyway what happens is that the eggshell is not completely airtight, and so the fluids that
are inside the eggs... Oh in fact? I don't know if you guys can see this, but there's... let me grab my phone
There's little little
air bubbles coming up out of
One of the fresh eggs because there's gas inside the egg and there's liquid as well obviously and that liquid can
Evaporate
And then it can come out of holes in the egg, so yeah
There's there's air coming out of the a because eggshells are not airtight
And that's that's not a bad thing that I've seen air come out. That's literally how they work, but anyway
The those gasses can leak out of an egg over time and and the liquid and in an egg will evaporate and the air comes out
So the total mass inside the egg goes down, but it's size doesen't change so its density goes down
Which means as it gets older and older it starts to float. So there you go
density eggs, density balls
and as always, thanks for watching