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To detect a particle it needs to interact with it the particles that we know, strong and electromagnetic interactions are quite easy to detect. Weak interactions are much more difficult and we cannot currently detect individual particles that interact only gravitationally (dark matter) we can only detect their presence on a galactic scale although there are currently quite serious efforts to detect variations in dark matter density on a solar system scale. We know of no other interactions. So to detect a hypothetical faster than light particle it must interact using one of the interactions that we can detect.Father than light particles have been proposed in some theories they are called tachyons (look this up in Google) but are not currently in favour and have never been detected.
I think you would have to be very very very strong to be able to push that metal ball through
If I had a tube stretching from earth to the sun and it is filled end to end with metal balls and I push one more ball in the earth end would one ball drop out the sun end at the same time.
Yes, even with only a metre long rod the fastest a force from one end can act on the other end is the speed of sound in the material. To simplify think of a long stick made of just one row of atoms. These atoms are all vibrating bouncing off each other at a certain speed depending on their temperature. So if i hit one end, that atom has to travel to the next atom before it can pass on this force. Then that atom has to hit the next, and so on. The atom I first hit does not directly influence the one on the opposite end, the energy must travel through the intervening atoms.This can be very fast in a solid because the atoms are closely bound together. In a gas such as air its much slower, the reason the speed of sound in normal air is what it is is because that's how fast the atoms in the air are travelling and bouncing into each other, therefore that's the fastest a sound wave can possibly propagate through the medium.
Quote from: justaskin on 02/01/2009 02:03:07If I had a tube stretching from earth to the sun and it is filled end to end with metal balls and I push one more ball in the earth end would one ball drop out the sun end at the same time.So no matter how much force you applied whether it be 10000 N or 500000000 N they will all move along at the speed of sound?