Ask a physicist anything. (6)

[Assyrian]

According to evolution, at any time, did atom2adam evolution pass through a vermiform stage?

Job 25:6 how much less man, who is a maggot, and the son of man (Adam), who is a worm!"
Isaiah 41:14 Fear not, you worm Jacob, you men of Israel!

 

[AV1611VET]

Job 25:6 how much less man, who is a maggot, and the son of man (Adam), who is a worm!"
Isaiah 41:14 Fear not, you worm Jacob, you men of Israel!

So the answer to my question is YES?

 

[mzungu]

So the answer to my question is YES?

AV could you please show me the similarities between the two pictures?

This is what you and all humans started out from the fusion of the tailed creature and the egg:

This is what human sperms fused with human eggs end up becoming:

So pray tell me where are the similarities?

 

[Chalnoth]

Its a hybrid and a beast at that too!

Right, it's a hybrid of a superconducting electromagnet and a non-superconducting electromagnet

 

[mzungu]

Right, it's a hybrid of a superconducting electromagnet and a non-superconducting electromagnet

Put two of those on opposing sides of your finger and they will crush your bone! No kidding! The Spring collapsing is WOW!

Amazing neodymium magnet - YouTube

 

[Mr. Pedantic]

I love the spoons and the chain thing at the end.

 

[Chalnoth]

Put two of those on opposing sides of your finger and they will crush your bone! No kidding! The Spring collapsing is WOW!

Amazing neodymium magnet - YouTube

Haha, yeah

I've got a few neodymium iron boride magnets myself. Much smaller ones, but still impressively strong (strong enough to hold 200 times their weight!) I've suspended a magnet from a half-inch wooden shelf by placing one magnet above the shelf and one below. I've used the magnets to stick a notebook to a refrigerator. And a bunch of other fun things.

 

[Mr. Pedantic]

Haha, yeah

I've got a few neodymium iron boride magnets myself. Much smaller ones, but still impressively strong (strong enough to hold 200 times their weight!) I've suspended a magnet from a half-inch wooden shelf by placing one magnet above the shelf and one below. I've used the magnets to stick a notebook to a refrigerator. And a bunch of other fun things.

Psh. Come back when you can stick the refrigerator to the notebook.

 

[mzungu]

Psh. Come back when you can stick the refrigerator to the notebook.

Hahaha - YouTube

 

[religious&reasonable]

I don't think this exactly falls under Physics, but what exactly is Cold Fusion and why does it only work theoreticaly? I have a general understanding, I just wanted some clarification.

 

[Doveaman]

This is what you and all humans started out from the fusion of the tailed creature and the egg:

This is what human sperms fused with human eggs end up becoming:

Isn't your explanation backwards?

Adam and Eve came first, remember?

 

[Chalnoth]

I don't think this exactly falls under Physics, but what exactly is Cold Fusion and why does it only work theoreticaly? I have a general understanding, I just wanted some clarification.

Cold fusion is something that a couple of fraudsters tried to pass off as valid science some years back.

 

[Wiccan_Child]

MY QUESTION: Does science ever lack truth because of the belief that everything has to be proven through the scientific method to be true?

No, since that's not how science works. Hypotheses are devised to explain observed phenomena, and these hypotheses are then tested. Sometimes these hypotheses are disproven when their tests come back false, but other times we gather more and more evidence for them, at which point they become 'theories'.

There is no point where they become 'proven', as this is beyond the purview of science. It is only in the hard realm of logic and mathematics that we can every prove something to be true. Nonetheless, the level of certainty we can get in science is extremely high indeed.

So, no, I don't think there's any real limitation on what can be known by science. At best, you could say that science can only deal with any phenomenon that can at least potentially and at least indirectly affect the scientist.

ANOTHER Q: How can scientists ever be sure that an idea (like evolution) is true when each and every scientist only knows what they learn when AFTER they come into the world?

Because they can review the evidence for themselves, and draw their own conclusions. Is the world round? Well, we have the same evidence now that people had 500 years ago, plus more, so we can just go out and review it for ourselves.

 

[AV1611VET]

I don't think this exactly falls under Physics, but what exactly is Cold Fusion and why does it only work theoreticaly? I have a general understanding, I just wanted some clarification.

From physorg.com:

To many people, cold fusion sounds too good to be true. The idea is that, by creating nuclear fusion at room temperature, researchers can generate a nearly unlimited source of power that uses water as fuel and produces almost zero waste. Essentially, cold fusion would make oil obsolete.

SOURCE

 

[Wiccan_Child]

I don't think this exactly falls under Physics, but what exactly is Cold Fusion and why does it only work theoreticaly? I have a general understanding, I just wanted some clarification.

Nuclear fusion is where two atoms fuse to become one atom, usually two lighter atoms that become one heavier atom. This releases a lot of clean energy which can be harnessed by us humans. Usually, we use enormous amounts of heat to generate nuclear fusion, but that's very wasteful and we rarely get any net energy out. Cold fusion, by contrast, is any process that generates nuclear fusion at colder temperature (ideally, room temperature), which would be far more efficient. The difficulty is in overcoming the electromagnetic repulsion between the two atoms, and the only reliable way we have of doing that is with heat - something like a superhot plasma or a laser.

 

[razeontherock]

Job 25:6 how much less man, who is a maggot, and the son of man (Adam), who is a worm!"
Isaiah 41:14 Fear not, you worm Jacob, you men of Israel!

I think this is what is known as doing violence to Scripture.

 

[razeontherock]

This releases a lot of clean energy which can be harnessed by us humans. Usually, we use enormous amounts of heat to generate nuclear fusion, but that's very wasteful and we rarely get any net energy out.

Wait, what? This has to be different from nuclear energy we use?

 

[Wiccan_Child]

Wait, what? This has to be different from nuclear energy we use?

Current nuclear power plants take heavy atoms and split them into smaller atoms in a process called fission:

Nuclear fusion takes two light atoms and fuses them. Both release energy - the light atoms want to stick together to be more stable, while the heavy ones want to split apart because they can't hold all their constituent protons and neutrons together. You may well ask where the tipping point is - and the answer is Iron. Atoms heavier than iron are 'too' heavy, and those lighter are too light.

The reason we want nuclear fusion is because light elements - such as Hydrogen and Helium - are ridiculously abundant, and only fuse to form other, common elements - the output is literally water. Nuclear fission takes rare, heavy elements and splits them in a process that creates a shower of secondary particles, many of which are quite harmful. Energetically, fusion is more efficient than fission.

 

[razeontherock]

:o Oops! Basic terminology I forgot about - thanks!

Only tangentially related question:

anybody here know of depleted uranium (DU) used as ammo, and it's effects? (Just trying to verify or disprove things I've heard; online mythbusters?)

 

[Chalnoth]

:o Oops! Basic terminology I forgot about - thanks!

Only tangentially related question:

anybody here know of depleted uranium (DU) used as ammo, and it's effects? (Just trying to verify or disprove things I've heard; online mythbusters?)

Well, Uranium is quite a toxic metal (as many heavy metals are). I don't think its radioactivity is a concern, but its toxicity is. I'm not entirely clear how strong the evidence is that DU specifically is a problem, but there are some worrying correlations between various health issues and the Iraq war.