Amusing attempts at perpetual motion for 300 years!! We have moved from pendulums, cogs and strings to electronics and pseudo quantum mechanics with its zero energy of movement or almost infinite vacuum energy. The casimir effect due to the variation of this quantum energy of movement...

Read on the internet the recent armada of scientific articles and summaries on sciencedaily.com or physorg.com bbc and others You live longer and you halve the risk of cancer statistically with a healthy lifestyle, regular intense exercise, fruits , 30% calorie restriction,...

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dear zorglub wrote: "for information, I made a solar thermal water heater in the 85s (modified several times) currently, I have 5.5 m2 of sensors that I made in the shape of a serpentine. I heat 220 liters of water 150l + 70 l in summer I reach 70° in the off-season (spring...

We can create a cheap system with a concentrator lens that is better in the sun and as an optical fiber a tube of transparent flexible plastic (or round of cheap plexiglass) full of water or oil with a high optical index. The lens in the sun may be a funnel with a transparent dome...

Fun, test for physicist! In summer they must die of heat with uninsulated roofs!! The holes in the roof without bottles serve to escape the stifling heat in summer! It doesn't have to rain often to punch holes in the roof. They have fiber cement roofs full of asbestos...

A glass or plastic bottle or transparent tube 3/4 filled constitutes a cylindrical lens which concentrates the sunlight below at its focus (maximum sunlight). So instead of aluminum, we can use a large glass or plastic tube, 3/4 filled with water or oil as a concentrate...

PET is treated to better resist UV rays but it is not perpetual. You have to find transparent PET treated with UV resistance but it is much more expensive. Plastic sheets for cabin roofs are more resistant without being made of PET but they are relatively expensive. The aluminum is bendable, but...

"The real problem seems to be the low pedaling speed" is correct, but if we are looking for a simple and very inexpensive solution, without looking for maximum performance, we can increase this speed with a belt passing from a large pulley (like the rim rear of the bike without tire) at a p...

The simplest is to use what already exists ready-made and which is going to be scrapped instead of building from scratch with a lot of trouble: a car fan is a 12 volt motor rotating quickly with permanent magnets which works very well as a dynamo (efficiency 80% as soon as resistance to movement...