Is it possible to have a mecha act as a walking particle accelerator?
Yes, but it wouldn't make a very good weapon, for the most part.
The reasons for this are legion, and are covered on this site and others ad nauseam. The problem is that particle beams just don't make very good weapons because they are inefficient and short ranged due to a number of ...
Photon-intermediate direct energy conversion (PIDEC) is a scheme for direct conversion of nuclear power to electricity.
PIDEC process is somewhat similar to a concept of fluorescent light - as in the CFL, in the nuclear reactor the original type of energy generated is not useful to humans. CFL uses a fluorescent coating on the inside of the ...
Thermite is often used by armed forces to damage/disable equipment
when explosives would be unwise. Some mixtures of thermite, like
thermate-TH3 burn hot
enough to damage cannon barrels and have been documented burning
though MBT armor. some mixtures of thermite have been documented
burning at 2500 degrees Celsius which is hot enough to melt ...
Why use microbots in a fantasy setting?
Make the dragon's breath symbiotic microorganisms. The organisms live in the dragon's "flame sacs" and are released when the dragon uses its breath attack. In exchange for being provided warmth and food by the dragon's body, the organisms attack to defend it as part of the dragon's breath attack.
This has the ...
The dragon's breath is not truly fire. It is a particle, much like a W boson, that has a limited lifetime before it decays. The neutralization of a presently unknown particle by that decay briefly reduces the energy level of the false vacuum, causing nearby particles to become more energetic. Emitted in very small amounts, this particle causes all nearby ...
The dragon's breath is not smart, the dragon is.
Now that this is clarified, let's talk about how the dragon breath would stop tanks and follow enemies around.
Since there's almost nothing about your dragons on your question I'm going to assume that they exist for a long time even before other races, therefore, they have been around time enough to know how ...
If you're not willing to say "a wizard did it", then your best bet is probably a symbiotic swarm of bugs with a highly corrosive spit that can eat through metal.
It's physically possible to have a fire breathing dragon, but I can't think of a way for a dragon with homing fire breath.