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The outward pressure of a star is primarily caused by nuclear fusion occurring in its core, where hydrogen atoms fuse to form helium, releasing immense amounts of energy. This energy generates radiation pressure, which pushes outward against the gravitational forces trying to collapse the star. Additionally, thermal pressure from the high temperatures within the star contributes to this outward push, maintaining a balance with gravitational forces and allowing the star to remain stable.
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What causes the outward force in a star?
The outward force in a star is caused by the pressure generated from the energy released during nuclear fusion in its core. This pressure counteracts the force of gravity pulling inward, creating a stable equilibrium that allows the star to maintain its shape and balance.
When a star's inward gravity and outward pressure are balance the star is said to be?
Hydrostatic equilibrium occurs when compression due to gravity is balanced by a pressure gradient which creates a pressure gradient force in the opposite direction. The balance of these two forces is known as the hydrostatic balance.
What happens when the outward force of pressure wins out over gravity in an old star?
When the outward force of pressure wins over gravity in an old star, the star will expand and cool, becoming a red giant. This process occurs as the star exhausts its nuclear fuel and transitions to a different phase of stellar evolution.
What star continues to use hydrogen for energy heat from fusion causes pressure that balances the pull of gravity?
Our Sun is the star that continues to use hydrogen for energy through nuclear fusion in its core. The heat generated from this fusion process creates outward pressure that balances the inward pull of gravity, allowing the Sun to remain stable and shine brightly.
Why do stars expand and contract in size?
Stars expand and contract in size due to the balance between gravitational forces pulling inwards and internal pressures pushing outwards. When nuclear fusion in the core of a star produces energy, it creates an outward pressure that can cause the star to expand. As the star's core exhausts its fuel, the outward pressure decreases, causing the star to contract under its own gravity.
What causes the outward force in a star?
The outward force in a star is caused by the pressure generated from the energy released during nuclear fusion in its core. This pressure counteracts the force of gravity pulling inward, creating a stable equilibrium that allows the star to maintain its shape and balance.
What do the outward and inward forces acting on a star have to do with it's size?
The outward force is the pressure generated by nuclear fusion in the star's core, which counteracts the inward force of gravity trying to compress the star. The balance between these forces determines the size and stability of the star. If the outward pressure exceeds the gravitational force, the star can maintain its size and stability.
How does gravity and nuclear fusion affect a stars size?
Gravity will cause a star to become smaller, because it pulls matter towards the star's core and causes it to contract. On the other hand, nuclear fusion will cause a star to become larger, because it produces an outward pressure, pushing the star's matter outwards and causing it to expand.
When a star's inward gravity and outward pressure are balance the star is said to be?
Hydrostatic equilibrium occurs when compression due to gravity is balanced by a pressure gradient which creates a pressure gradient force in the opposite direction. The balance of these two forces is known as the hydrostatic balance.
What happens when the outward force of pressure wins out over gravity in an old star?
When the outward force of pressure wins over gravity in an old star, the star will expand and cool, becoming a red giant. This process occurs as the star exhausts its nuclear fuel and transitions to a different phase of stellar evolution.
What does the equilibrium between the outward pressures of radiation and the force gravity do?
"While the star can produce energy, that keeps the star in balance - it keeps the star from collapsing. By the way, another outward force is the gas pressure, but that, by itself, is not enough to counteract the force of gravity in the case of a star."
What does the equilibrium between the outward pressures of radiation and the force of gravity do?
"While the star can produce energy, that keeps the star in balance - it keeps the star from collapsing. By the way, another outward force is the gas pressure, but that, by itself, is not enough to counteract the force of gravity in the case of a star."
What does the equilibruim between the outward pressures of radiaion and the force of gravity do?
While the star can produce energy, that keeps the star in balance - it keeps the star from collapsing. By the way, another outward force is the gas pressure, but that, by itself, is not enough to counteract the force of gravity in the case of a star.
What is the relationship between pressure and gravity on a red giant?
To start with, the star's gravitational attraction is not sufficient to offset the outward radiation pressure. As a result, the star increases in size until the two are in balance.
What prevents the collapse of a neutron star and allows it to maintain its stability and structure?
The collapse of a neutron star is prevented by the outward pressure of neutron degeneracy, which counteracts the force of gravity trying to compress the star. This pressure maintains the stability and structure of the neutron star.
What star continues to use hydrogen for energy heat from fusion causes pressure that balances the pull of gravity?
Our Sun is the star that continues to use hydrogen for energy through nuclear fusion in its core. The heat generated from this fusion process creates outward pressure that balances the inward pull of gravity, allowing the Sun to remain stable and shine brightly.
What is external pressure?
outward pressure
