Device Definition and 504 Threads

first thing, do you think such a device can be technologically feasible? do you think we need it? i think if we can build such a device why not?! i think the advantages of it are more than the disadvantages.

Yeah I know thermodynamics says it's a scientific impossibility, but what is the closes inventors have come to a free energy device? Or what is the best energy producing system out there for its size[?]

A laser is a device that uses light flashes to excite the atoms so you get electrons with energy levels about 2 or 3 levels above the ground state. They emit photons, which vibrate at a particular frequency, they get reflected off the half silvered mirror, to excite electrons and make them emit...

My CD_RW drive died last week and I just bought a new one. I made it the master, and the CD rom the slave. Since doing this the drive names have changed letters. I assume that is a normal thing. But also now my computer no longer recognises any imaging devices connected to my USB ports...