Re: Physisist in the house ?
Originally Posted by
Fogey
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How can you not see that that argument is flawed from the outset.
I repeat, the pin and the magnet are inside the same gravitational field.
If the magnet were outside the gravitational field of the earth and was able to pick up the pin then you could argue that the gravitational field of the earth is weak.
I don't care about the strength of electromagnetic fields, because without gravity there would be no electromagnetic fields.
If you want a simple analogy: A man is in an aeroplane travelling at 500 miles an hour. He runs down the length of the plane, in the direction of flight, at ten miles per hour.
Now, is the man running at 10 mph or 510 mph? Now if the man ran against the direction of flight, would he be running at 10 mph or -490 mph.
Hi
We are composed of matter, matter is composed of atoms.
In the middle of atoms there are protons and neutrons.
Protons have a positive charge, neutrons have a negative charge.
Around them circle electrons.
If gravity was a strong force, stronger than the forces that keep atoms together then we would just be mush, which we obviously are not.
For us to exist, gravity has to be the weakest force.
It is incredibly weak.
I hope this next bit helps'
Electromagnetic and gravitational fields
Sources of electromagnetic fields consist of two types of charge – positive and negative. This contrasts with the sources of the gravitational field, which are masses.
Masses are sometimes described as gravitational charges, the important feature of them being that there are only positive masses and no negative masses.
Further, gravity differs from electromagnetism in that positive masses attract other positive masses whereas same charges in electromagnetism repel each other.
Electromagnetic interaction has a strength of 10 plus 36 zeros, compared to gravity.
I know it is weird and I apologise for my inability to explain it clearly.