RE: LHC starting up again
April 5, 2015 at 7:29 pm
(This post was last modified: April 5, 2015 at 8:15 pm by Anomalocaris.)
In active main sequence stars of any size it is the radiant pressure of thermal nuclear reaction that is holding up the star, not the static pressure of the gas in the star being pressurized by the weight of the rest of the star above it. So I guess the it seems to me the statement "gas is pressurized" conveys the wrong impression about what and how pressure is holding up the Star.
I believe the statement "there is no pressure in vacumn" is untrue. There would be measurable pressure force in pure vacumn if you have a large enough container with which to measure the pressure of the vacumn of the space inside. The pressure force of vacumn of space appears to me to be relative and proportional to the how much space you measure the pressure over. So in space the size of a vacumn chamber, a space craft, of a planet or a solar system, the measured pressure forceof vacumn would be vanishingly small. In space the size of galactic superclusters the pressure force is enough to accelerate galaxies on its boundaries to appreciable fractions of speeds of light over the life of the universe.
The difference between normal concept of pressure and vacumn pressure is with normal pressure the force of the pressure is not directly dependent on how much pressure causing substance the measurement is being conducted over. A gas pressure transducer of any size located anywhere inside a bottle of pressurized gas will register the same pressure. But a notional vacumn pressure sensor will register different pressures depending on the size of the sensor.
I believe the statement "there is no pressure in vacumn" is untrue. There would be measurable pressure force in pure vacumn if you have a large enough container with which to measure the pressure of the vacumn of the space inside. The pressure force of vacumn of space appears to me to be relative and proportional to the how much space you measure the pressure over. So in space the size of a vacumn chamber, a space craft, of a planet or a solar system, the measured pressure forceof vacumn would be vanishingly small. In space the size of galactic superclusters the pressure force is enough to accelerate galaxies on its boundaries to appreciable fractions of speeds of light over the life of the universe.
The difference between normal concept of pressure and vacumn pressure is with normal pressure the force of the pressure is not directly dependent on how much pressure causing substance the measurement is being conducted over. A gas pressure transducer of any size located anywhere inside a bottle of pressurized gas will register the same pressure. But a notional vacumn pressure sensor will register different pressures depending on the size of the sensor.
