Recent content by shjacks45

Amerecium241(smoke detector) is a alpha (5.5MeV) emitter as is Ra226 (4-10 MeV). Alpha is blocked by air or paper and beta is blocked by Aluminum foil. These also emit gamma (high energy x-rays) which pass through things easily. Similar to cloud chamber, at the University Hospital I worked at we...

I worked in a PCB shop. Soldering is done to protect physically joined parts/wires. If I ask "what is supporting the LED?" please don't say the wires. Also, what is the solder specified? Is it ROHS or Tin-Lead? Most newer electronics is surface mount, non-lead solder. Higher Power LEDs require...

2450 MegaHertz magnetron frequency of microvave ovens has a wavelength of 10 centimeters. From microscopy there was a optical limit of detection being half a wavelength, the holes in my microwave door grating are ~1mm.

Funny you didn't mention that Vanadium50 is a Natural (primordial because it would exist at the birth of the Universe) isotope with a half life of 10^17 years which is many times the age of the Universe. Bismuth209 also has a 10^16 year half-life, would have to be created by the first supernova...

Any additional positively charged fission decay fragments are repelled by the anode and attracted to the grids negative charge. A mol wt 100 ion accelerated to 1 MeV gives the fragment 100 MeV of energy. So an anode at 1 MV would mean only a fraction of fissions' energy is captured, most of the...

"Tau Zero" by Poul Anderson what if you went so fast you survived the next big bang.

I used "phosphor" to simplify atomic emission (chrome in ruby), emission from organic dye molecules, emission from charge anhiliation in semiconductors (bandgap laser).

Not sure what you are looking for with "non-linear". Like most lasers, a minimum number of phosphor in the exited state before a laser discharge can occur. Others like He-Ne lasers keep enough molecules in the exited state to discharge continously. Perhaps a threshold for emission is your...

Duh, (unless it is exceedingly pure) water conducts electricity.

Usually rub comb with silk or combing dry hair, so that's where the electrons went. Old rubber combs had a positive charge. The reason the water stream bends is due to charges being induced by the comb on the water stream.

ATmega8A is micro, "ATmega 8A" is just more bad spelling.

"two ATmega 8A μCs." So a 16 Ampere supply? The 1N4007 are 1 Amp max and LM7805 versions are 1 Amp max. Transformer standard voltage 6.3 VAC typically max out at 10 Amps. Or pay for custom transformer. It will weigh a lot and cost $$$. 8 volts is typical computer power supply from 6.3 volt...

If you spend the money required to do the medical testing required, overpriced like most medically related tasks, often in the millions of dollars in debt then to market the drug to repay development costs become harder when a drug is generic and any low cost company can undercut you and sell...

I am a bit confused. The hypersonic tests that I've heard of fly these hypersonic devices in higher altitude thinner air. So with this hypermaneuverability hypersonic missiles will travel 50 feet above the ground like cruise missiles? Since the hypersonics are tested at high altitude, do we know...

Missile fins are at the rear. A high speed plane making a sudden vertical stabilizer only turn leads to a flat spin. At hypersonic speed a flat spin at mach 5 is probably destructive to the missile.