gonelli

Hasn't this forum shown HHO gas systems being a loss of energy, rather than a gain?

If you wanted to keep books of science accurate, then we should all be still believing that the world is flat.

Figured that might be answer, it makes sense. Thanks insane_alien. Thermoacoustics looks very interesing, may have to do some more reading on that.

This may sound like a very strange question to ask, but since heat is a result of atoms/molecules in an object vibrating. Is it possible for something to have such a high temperature that the vibrations of the molecules will be enough to produce an audiable sound that a person could hear a perhaps a humming sound?

Is there a certain number of gene mutations that need to occur before the mutated virus can be classified as a different strain?

Vaccination is when a weakened or dead form of the virus is put into the body, which the body then recognises as "bad" and will create antibodies that help the body fight that particular virus. So it isn't correct to say a virus becomes immune to vaccination, rather a new strain of the virus could infect a person and the body will not know straight away that this is a virus. Which results in the body needing more time before it can start fighting it with maximum effect. If the body has already incountered a particular virus before, it is a able to get rid of it faster, which is why a person may not get as sick or recovers quicker than if they wern't immune to the virus.

Perhaps book worm is the publisher, or maybe the publisher read this thread and decided to use it for their review... ....or not

I'd like to watch it, but apparently only those in the US can enjoy it on the PBS site. Know of any other sites or places where someone, possibly from Australia, could watch it?

"we have ears...string, vibratory, they pick up vibration" So she is saying that she can hear the strings vibrating? Wow, that's impressive - i don't know anybody else that is able to hear them. I wonder what scienctific theories she used to explain previous to string theory being announced?

Now that would take some serious mind power!

That's probably the case, basic solution that the plant draws from its roots to reach the location of photosynthesis would most likely be weakened by the time it gets there. So the only way to really see how basic solution affects photosynthesis, I guess, involves apply it to the leaves - which wouldn't be very good for them.

Well, I do know there are many plant species that like to have basic soil around them. But a more important point is maybe, how badly damaged will the plant's roots/leaves be damaged if this very basic solution comes in contactwith it? The plant may get destroyed enough so that it can't draw anymore water or other nutrients, making it hard to live besides trying to perform photosynthesis.

But remember, you don't want to be mixing hydrogen and chlorine in the hope of making HCl. Very dangerous to do at home!

Well, considering the fact that humans have been selectively breeding and cross-breeding species for a very long time, genetically modifying animals isn't that new. But the technology we have to pick precisly which genes or alleles we want in animals in very new, and that's definetly worth looking into.

Well, I found my answer Fe (s) + 2H+ (aq) ---> Fe2+ (aq) + H2 (g)

I agree with your very valid point "because it is", but unfortunately cos25 - cos50 isn't equal to 1/2, it's closer to 0.2635

I'm just a little stuck on a chemistry homework question at the moment. The question is about the use of cast iron cookware with acidic foods (such as fruits) resulting in iron(II) ions being ingested. And the question asks for a balanced ionic equation showing the formation of iron(II) ions in an acid solution. I know that the iron could oxidise to iron(II) ions and lose 2 electrons, but I can't think of how to show it in an acid solution. Do all I need to show is the oxidation half equation? Or is there something more, and if so what is it? Any ideas?

If you want to know if it's diabetes, you could maybe find a friend who has one of those machines that tests blood sugar levels or maybe even buying one and testing yourself.

You've probably already found the answer on google, but I did come across this page when browsing the internet http://www.itisacqui.it/sitob/formagette/curdling.htm

I know from when my grandmother would make ricotta cheese that vinegar was added to make the milk curdle

If there is no precipitate produced then there isn't any reaction between the reactants, so you can't really write an equation for it. I think insane_alien was refering to when you have a single salt in solid form and then dissolve in water, which would then require puting [aq] after the two ions from the salt.

In light of breakthrough number 2, more study may be needed to be done soon on number 8 before the Chimpanzees start hunting humans. lol Number 1 and 4 are very interesting, and number 7 sounds like it could have many applications in the years to come.

Well, you shouldn't need to ask this question since you already asked it in the homework help section - all the help and pointers you need are there

I understand that many people who do not believe in evolution due to religious beliefs, etc. But what's wrong with learning about a theory that has scientific merit? It's like people calling for a ban on the broadcast of Xmas charols because they may mention Jesus, or some other religious belief that not all people think is right.

Well, I can tell you that combining salt and vinager will probably not produce any hydochloric acid. In solution HCl ionises to H3O+ and Cl-. The Cl- is a weak base, so does not attract H ions to itself at all well. Acetic acid (CH3COOH), which is the acid in vinegar, is a weak acid, there is an equilibrium in solution of the CH3COOH and the formation of CH3COO- and H3O+. The equilibrium lies a long way to the protonated acid side. So, with conjugate base (CH3COO-) being a stronger proton attracter than water, this means it likes to stay as the CH3COOH. Even with the presence of the NaCl, the equilibrium for the Acetic acid may then shift as you allow the attraction of Na+ to the CH3COO- (but this is usually dissociated in solution anyway). The formation of HCl requires the removal of the acetic acid, the CH3COONa and the H2O from the solution. You are not really going to be able to do this at home.