Big Bang Theory: Force & Surface Questions

AI Thread Summary
The Big Bang Theory posits that the universe began under conditions of high temperature and pressure. The discussion clarifies that pressure is defined as force divided by surface area, prompting questions about the nature of the force involved. It explains that the force in question refers to the interactions between molecules, rather than just gravitational force. Additionally, the concept of "surface" is not limited to physical surfaces but includes any area where pressure is exerted, such as within a closed gas container. Understanding these dynamics is crucial for grasping the implications of pressure in the context of the Big Bang.
Mohamad&Issa
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Hi,
The theory about big ban says that there were high temp. and high pressure.
But pressure=force/surface
I want to ask about the the force. Force of what? Is it the force of gravity?
And is the surface for the atoms?
Thanks.
 
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It's not just a physical surface, but any area. For example, inside a closed container of gas the molecules exert pressure on themselves equal to the pressure they exert on the container walls. Any square centimeter area inside the gas has equal pressure to any square centimeter of the container wall. The force is the force of the molecules impacting each other.
 

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