Re: Physisist in the house ?
Hi
Gravity, a much misunderstood thing.
It is incredibly weak, contrary to popular belief.
Use a small magnet to lift a pin off a table and you have overcome the entire gravitational force of the earth, think of fridge magnets as the same.
It is not like magnetism, which can be turned on and off, and is a much stronger force.
There are strong electromagnets in use in normal everyday life.
When you go to the hospital you walk through fire doors in the corridors held open by electro magnets.
If there is a fire, the electricity to them is cut and they swing closed.
We have magnetic trains.
You cannot turn gravity off, well not at the moment at least.
If we could turn gravity off we would not need rockets to get us into space, hence the fascination with anti gravity plates.
Simple, isn't it, what we are taught at school?
The apple falling on Newton's head, it explains everything we see both on earth and in the skies, planets rotating around the Sun and not just floating off all over the place.
Then along came Einstein who put the kibosh on that.
Out goes Newton's Law and in comes Relativity.
Gravity is not a force, it is a result of the shape of spacetime.
We basically know nothing, Gravitational Waves, first thought of by Einstein a 100 years ago have only just been detected.
https://www.theguardian.com/science/...nal-waves-ligo
We also think that gravity is transmitted by gravitons, a mass less particle.
We are hunting them at Cern, the big collider in Europe.
It will be fascinating if we find them as they can only exist in another dimension.
Surfermom can explain the big bits, she is an astronomer.
I like the little bits.
Gone are the days of falling apples and atoms having just protons, neutrons and electrons.
Welcome to the brave new world of ripples in spacetime and extra dimensions.
Science Fiction is becoming Science Fact.