Did you know? (Science Edition)

Re: Did you know? (Science Edition)

Melting water streams from iceberg in Disko Bay, Greenland :hayaa:


Restored attachments:

Re: Did you know? (Science Edition)

^:(

Did you know that the chair that you are sitting on, or the floor that you are standing on, 99.9 % comprises of nothing (I can see Philosophy asking me - explain 'nothing)? It means that the chair, or floor, or for that matter you, consist of 99.9 % of empty space.

Then why dont we fall through the floor or can walk through the walls?

No googling : mad:

Re: Did you know? (Science Edition)

Yes please do explain this further...

all I know is each one of us is a star...

Re: Did you know? (Science Edition)

do you want the wave explanation or the particle explanation? :snooty:

Re: Did you know? (Science Edition)

The Self is everywhere. Bright is the Self,
indivisible, untouched by sin, wise,
Immanent and transcendent. He it is
Who holds the cosmos (and chair, floor, wall) together

Isha Upanishad

Queer, wrap the particle explanation in wave explanation and esplane to her.

Southie, very nice. I like it.

Philosophy, ok Google it :(

Re: Did you know? (Science Edition)

:mad:

Ok ok I will tell you. Every atom has a nucleus in the middle and have a cloud of electrons around it. That cloud is almost empty, but that is the space where few electrons are rotating around the nucleus. To understand the size difference between atom and nucleus and amount of empty space, imagine atom as a soccer stadium, nucleus as a soccer ball sitting right in the middle, and electrons as a handful of players occupying the very little of the huge empty space.

Our bodies and everything around us are made of such atoms, which means everything is nothing but 99.9% empty space.

Then why don’t you fall through the floor? The “solidness” of anything is just a perception. What is holding you from passing through the floor is that the electrons of the top surface of the floor and the electrons of the bottom part of your feet are repelling each other as they have similar charge, giving you the feeling of standing on a solid floor, preventing you from passing through it.

I like to add a little more on how powerful this force of electric repulsion/attraction is, but more on this later.

Re: Did you know? (Science Edition)

Ok. Understood the force of repulsion. But how come we don't SEE the M.T. space?

Simple. We only see the visible light and our vision works within the limit of certain wavelengths. The empty space in each atom is way way smaller than wavelength of any kind of rays that we know.

Hope it made sense

Re: Did you know? (Science Edition)

Ohhhh...that was very interesting..and I actually understood what I read :D

Re: Did you know? (Science Edition)

Ok. The empty space is much smaller than visible wavelength range. So what is it that we do see when we "see" an object?

If it is repulsive force, why does it hurt when we punch a concrete block? And not hurt when we punch a chappathi dough? There is something there. Not just empty space. That we touch and feel?

When light bounces off an object, we see the object. If there is no light to be bounced back, or the object is so small that it can't even disturb the wave when the wave passes around it then we can't see the object. Think of big ocean wave. If wave hits a huge rock, it bounces back, but it just passes undisturbed over small pebbles.

For the second part of your question, there is a difference between space within atoms and space between atoms. A slab of ice has no space between the atoms and the atomic bond is strong if you may, while tub full of water has lots of space between atoms and that space gives away when you jump inside water vs when you crash land on a slab of ice.

When your atoms get pushed back by another object that you just hit, then you feel pain. you might end up pushing the atoms of the other object, like in case of dough. In that case the energy of the impact gets absorbed by the dough. In case if you punching a wall, it's mostly your fist that absorbs the energy. That is why you feel the pain.

Re: Did you know? (Science Edition)

Thanks! Now the title of Funda Man is undeniably yours!!

The second part is clear. I am having trouble with the first part.

If most of an object is empty space, the empty space should be the Rock. And the remaining space the pebbles. The Rock ( or empty space) is too small to disturb light waves. So the remaining portion of the "solid" should be even smaller?

Actually the whole atom is pebble. I think you can probably think of a big piece of mosquito net which is mostly empty space but mosquitoes no matter how small, can't pass through it.

Re: Did you know? (Science Edition)

I love it !!

When did you get so smart...I had no idea we shared similar interests chupey rustM

Re: Did you know? (Science Edition)

Sigh physics is my weakest science... I'm so jealous!!!

Tlk you shouldve done a PhD and taught people...

Re: Did you know? (Science Edition)

If the whole atom is like a pebble, light should pass around it undisturbed. There is no rock for light to bounce off. So object should not be visible?

In the mosquito net analogy, space is equivalent to empty space of atom. Mosquito equivalent to light? Light can pass through empty space. So mosquito should pass through the net?

no we don’t, like I don’t have any interest in that boy who lives next door to you :frowning:

Ok joke aside, I am happy that I was able to share a little and it even made sense to you and southie and aaliyah.

Southie, you are right about the first part. Second part, I have to rethink my mosquito net analogy. That was probably not a good example.