tech99's latest activity

The black stains might be silver halides, in which case sodium thiosulfate will dissolve them. As silver is very toxic, to both people...

I would suggest the 2 volts is related to the work function of the material. I should have thought that oscillation in the GHz region...

I also observed similar effects with a sonic boom. When Concorde was flying over the Atlantic, I would often hear the boom when walking...

Rolls Royce SMR are producing small, modular reactors, and are contracted to build the first new station at Wylfa, UK, and Temelin...

The video focuses on imparting information to students. The primary issue for teaching is not this. It is the development of human...

My experience was that Zoom was hated by the students, the teachers were not getting feedback from them and very little learning took place.

I am concerned about using AI to replace teachers. Children seem to have too much exposure to screen time - we are running into...

I remember on the last time a manned space craft went behind the Moon, the radio signal did not restore as soon as the crew could see...

X-rays are not emitted below 20kV accelerating voltage so far as I know, so it was only when colour TV started that it became an issue...

I suppose the invention of high inertia without high mass is analogous to discovering high permeability cores.

The device can add inertia to the suspension travel without adding very much actual mass. If the suspension is thought of in an...