Matter pressure and vacuum pressure

In summary, matter pressure is the force exerted by matter on its surroundings, caused by the movement and collisions of particles. It is typically measured in units of pressure and can be measured using a pressure gauge. Vacuum pressure, on the other hand, refers to the pressure within a vacuum and is used to describe the level of emptiness. It is created by removing matter from a space and has various applications in different fields. Both matter pressure and vacuum pressure play important roles in processes and technologies such as filtration, distillation, and space exploration.
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roopace
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how do I calculate the time when matter pressure and vacuum pressure add to 0 in the evolution of the universe. I have an exam of gravitation and cosmology coming Monday but have no clue where to start from. I can find nothing on weinberg and kolb and Turner textbooks
 
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  • #2
Calculate both as a function of time, set them equal (apart from their sign). You'll need some values of the current or earlier universe to start with. Which numbers can you use?
 

FAQ: Matter pressure and vacuum pressure

What is matter pressure?

Matter pressure refers to the force exerted by matter on its surroundings. It is caused by the constant movement and collisions of particles in a substance, such as gas, liquid, or solid.

How is matter pressure measured?

Matter pressure is typically measured in units of pressure, such as pascals (Pa) or atmospheres (atm). To measure it, a pressure gauge is used to determine the amount of force per unit area that is being exerted by the matter.

What is vacuum pressure?

Vacuum pressure refers to the pressure within a vacuum, or an area devoid of matter. It is typically measured in units of pressure, such as torr or millibars, and is used to describe the level of emptiness or "suction" in a space.

How is vacuum pressure created?

Vacuum pressure is created by removing matter, such as air, from a space. This can be done through various methods, such as using a vacuum pump or creating a sealed container with a partial vacuum.

What are some applications of matter pressure and vacuum pressure?

Both matter pressure and vacuum pressure have numerous applications in various fields, such as chemistry, engineering, and physics. They are used in processes such as filtration, distillation, and refrigeration, and are essential in technologies like vacuum tubes, vacuum cleaners, and space exploration.

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