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large hadron collider

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Possum
Soon the large hadron collider will come online. They hope to use it to create a black hole. If this black hole does not evaporate things don't look too good. I dont think experiments like this should be aloud to happen..

Your Opinion please..
Indi
Possum wrote:
Soon the large hadron collider will come online. They hope to use it to create a black hole. If this black hole does not evaporate things don't look too good. I dont think experiments like this should be aloud to happen..

Your Opinion please..

Perhaps you would like to show us the math and the theoretical framework that leads you to that conclusion?

i'm assuming of course, that you have a real reason for being concerned, and you're not just afraid because you saw a black hole on Star Trek or something where it was a bad thing because the busty Borg said so?

The LHC will not be doing anything that doesn't already happen in our vicinity all the time. The energy levels just really aren't that high. If there were really a danger, surely sometime in the last billion years or so something would have already happened with one of the cosmic rays bombarding us.
Possum
How fast do Cosmic rays go..Are there some that go really fast..

Where do they come from
Bikerman
Possum wrote:
How fast do Cosmic rays go..Are there some that go really fast..

Where do they come from

Cosmic rays are mostly made up of a single proton (a hydrogen atom without the electron), some are helium nuclei, a very small proportion are even heavier atom nuclei, and a very small proportion are made up of electrons, neutrinos and gamma radiation.

The speed of cosmic rays depends on the type of particle under examination. or that reason it is more usual to talk about the energy than the speed. The unit of measurement used is the electronvolt which is the amount of kinetic energy that an electron picks up when accelerated by 1 volt of electrical potential. It is a very small amount of energy - expressed in a more familiar unit - Joules. 1 eV is about 1.6×10e-19 Joules.

Cosmic rays generally have an energy of between 100MeV (100 mega eVs - 100,000,000 eV) and 10GeV (10 giga eVs - 10,000,000,000 eV).
Some, however, have much higher energies - as much as 10e20 eV (1,000,000,000,000,000,000,000eV) which is about 50 Joules (that equates to the amount of energy a tennis ball has when first-served by Venus Williams).

Most Cosmic rays are thought to originate in Supernovae but the really energetic ones are still a bit of a mystery - they could come from a fairly recent discovery - super massive stars collapsing to form super massive black holes and releasing a huge burst of gamma rays - but as yet scientists don't really know.

To get back to the original question : to convert the energy into the speed you need to know the mass and then carry out some math - the formula is a bit tricky but nothing above normal algebra level.

(click here for the math if you fancy doing some sums - I had to use a web page because otherwise the symbols get very confusing - the example I've illustrated does the math for converting 10GeV to velocity for a proton).

If you don't want the math then it works out that 100MeV for a proton is around 43% of the speed of light and 10 GeV is around 99.6% of c.
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