The size of the sun is maintained by a balance of inward gravity and outward pressure,what makes this possible

Answer 1

Fusion.
The sheer mass of all the hydrogen in the sun creates a tremendous amount of pressure, causing the fusion of hydrogen into helium. The reaction creates a tremendous amount of energy which radiates outward from the center of the mass. The gravity of the mass itself counteracts this, thus containing the size of our sun to its observed diameter. Once the hydrogen has been spent, and helium begins to be fused, the sun will oscillate its size as it attempts to maintain the new balance of outwards pressure vs. gravity.

Answer 2

First of all the temperature in the core is much higher compared to the surface, so the gas in the core is in high temperature which causes the gas to expand, if some thing avoid this gas from expanding -here the gravity or the weight of the surrounding mass- the gas would introduce pressure -ie force/area.
so the gas would expand to a amount that the pressure force inside be at equilibrium with the gravitational force.

(based on boyl mariot rule if u chang the volume then the pressure would change in reverse direction PV=nRT)


"Their shape and size is maintained by a balance between the competing forces of gravity pulling inward and internal gas pressure pushing outward. This balance - called gravitational equilibrium or hydrostatic equilibrium - means that at any point inside the Sun the weight of the overlying material is supported by the underlying gas pressure. At higher levels, the overlying weight is less, and the pressure also decreases. Gravitational equilibrium in the Sun means that the pressure increases with depth, making the Sun extremely hot and dense near its center. " from ref below.

Answer 3

the outward pressure is the nuclear explosions that happen when hydrogen turns into helium. it's effectively a continuous atomic bomb.
the inward pressure is our old favorite gravity.

the star expands or contracts to a point when the forces are balanced.

Answer 4

The process of fusion is going on in the sun, creating enough outward pressure to maintain the sun's present volume, and it works in conjunction with the pressure created by it's gravitational pull. For fusion to happen, enough pressure and temperature must be present to literally push the components of the hydrogen atoms together with enough force that they create helium atoms.

Answer 5

Think of it this way:
Temperature can be expressed as the average velocity of the particles, (ions, atoms, molecules), in the sample.
At higher velocities, the particles tend to escape the gravity of the total mass , (outward pressure).

Answer 6

inward gravity and outward pressure makes it possible.

Answer 7

You said it in the question. BALANCE.

In physics it is sometimes called equilibrium..........