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Another interesting case is the bottom point of a train wheel, which is travelling backwards.

As a radio engineer, it seems to me to resemble some behaviour which was well known by 1910. If we have two resonant circuits of the...

Heeling is caused by the couple created by the sideways force of the sails and the opposing sideways lift of the keel. Heeling is...

May I mention again that the leeway angle is equal to the angle of attack of the keel. It is important that the area of the foil is...

For a column in compression, according to Euler's formula, the buckling strength is not sensitive to the yield strength of the material...

Maybe first consider the function of a fin (or centreboard on a small craft). The sail is a aerofoil in the wind and a fin is an...

How are you going to measure potential difference without introducing electrons into the process?

If I place an electric circuit, containing a suitable indicator, in the path of an EM wave I can notice a current being created.

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...