vrus

Oxygen need something to burn with. If you have a gas jar filled with oxygen, it will require something to burn with to use up the oxygen in the same.

This whole thermite thing gives me the feeling of someone trying to push something with high inertia but once that thing starts moving its unstoppable ! Also, it can be done with other reactants right ? My teacher told me the larger the difference in reactivity the more violent it is. Has anyone done it using different reactants ? What was it like ?

Did you know that, when lightning occurs as we see it, it is actually the scond part of the lightning process ? So actually, an 'invisible' charge goes up from the ground upto the clouds and then we see the flash that strikes the exact same place the the charge went up from. So maybe, if we can actually cause/ control the place it goes up from, we could control where the lightning hits. An insulated conductor with a high static charge artificially created by direct contact/ induction... keep thinking....

Can someone help me out and give me a good explanation about Pyroelectric crystals and Piezoelectric crystals ? Help appreciated ! THnks.

Similar to what douglas said, I found out from one of my old books, that in these kind of situations, the two objects are connected by a copper wire first. So basically planes never get charged ? Well, well, well...! Is there any website that explains more about this ? Thnks. for the help !

Man ! after reading this thread, I ain't going anywhere close to this stuff! No way. Not for me !

Planes get charged up when flying through clouds right? That's why they're earthed when they land. But in the case of mid-air refuelling, the planes can't be earthed. If there is a spark, then things can be lethal. How do they prevent this from happening ? Do they make the refuelling probe out of rubber or an insulator ?

What countries are involved in the F-35 project ? I know USA and Britain are. Any others ?

Two points ppl. First, the F-35 DOES NOT have thrust vectoring. Only the Raptor does. Second, this thread is supposed to be about a RUSSIAN 5th gen. fighter! For the JSF, etc start a new thread. In fact I'll do it myself and we can argue about thrust vectoring ther !

Thanks. That really clears things up. However, how would you define spontaneous ? I've never really used that word before. I think I know, but its better if you clear it up. Another thing; doesn't entropy have many different meanings ? Someone told me it it is a calculation of all the possible ways a reaction can go ? What do you say about this ?

Yeah I heard about that formula, but what do they actually mean ?

What are entropy & enthalpy ? Are they related ? If so, how ? And what is 'Gibb's free energy' ? Thnks.

I'm curious on whether esters are dangerous if consumed directly ?

So these ions are'nt dangerous to us ? I mean what about alpha radiation, it is basically a Helium ion and if it penetrates, its trouble ! Thats the example i couldn't understand.

Can you give me an example of them existing on their own ?

I thought the Su-47 project was cancelled as they found problems at high speeds due to the froward swept wings? And I also read that the MiG-1.42 was not going to be used, but used as a Tech. Demonstrator ?

Can ions exist on their own ? ( In terms of stripping off or adding electrons to elements ) Will they combine with things in the air ?

I don't understand why on earth you want Rust ? What's the use ? (none that I know). It doesn't smell great either !