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the dominant force resisting gravity in the sun is simple gas pressure. however, this would not be sufficient were it not for the energy being released by the nuclear reactions in the core of the sun. the energy released in the core pushes the material outwards a little as it escapes, providing just enough additional outward pressure to balance gravity and hold the star in equilibrium.
What else can I help you with?
Did gravity form stars?
Yes. Stars form when clouds of gas and dust, called nebulae, collapse under the force of gravity.
Explain why the sun does not collapse under the force of its own gravity?
Stars do not collapse because the inward force of gravity is balanced by the pressure generated by fusion. When stars die they do collapse. The cores of low to medium mass stars collapse to form white dwarfs. Further collapse is prevented y electron degeneracy pressure. More massive stars leave behind neutron stars, in which gravity is balanced by neutron degeneracy pressure. In the most massive stars, once fusion stops producing energy there is nothing to stop the collapse and the core becomes a black hole.
What type of forces cuased the solar nebula to contract?
The force of gravity caused the solar nebula to contract. As the nebula collapsed under its own gravity, it began to spin and flatten into a disk shape, eventually forming the Sun and the planets. Additionally, the heat and pressure generated by the gravitational contraction contributed to the collapse of the nebula.
Why prevents stars collapsing under the force of their own gravity?
The pressure of the fusing gasses
What two factors cause a nebula to develop into a star?
The two main factors that cause a nebula to develop into a star are gravity and heat. Gravity pulls the gas and dust in the nebula together, causing it to collapse under its own gravity. As the collapse continues, the temperature and pressure in the core of the collapsing nebula increase, eventually reaching a point where nuclear fusion ignites, and a star is born.
Did gravity form stars?
Yes. Stars form when clouds of gas and dust, called nebulae, collapse under the force of gravity.
Can a planet collapse under its own gravity?
No, a planet does not collapse because gravity isn't strong enough to provide enough pressure to crush a planet. You might make a planet heavier and heavier as to increase its gravity but at some point the pressure in the planet's core will be high enough to support nuclear fusion and the planet will have changed into a star. At that point radiative pressure also begins to fight gravity.
Explain why the sun does not collapse under the force of its own gravity?
Stars do not collapse because the inward force of gravity is balanced by the pressure generated by fusion. When stars die they do collapse. The cores of low to medium mass stars collapse to form white dwarfs. Further collapse is prevented y electron degeneracy pressure. More massive stars leave behind neutron stars, in which gravity is balanced by neutron degeneracy pressure. In the most massive stars, once fusion stops producing energy there is nothing to stop the collapse and the core becomes a black hole.
How can you measure mass?
Weight them under gravity or calculate from momentum of impact or spring load under centripetal force in space. Then refer the weight or the force to the gravity of earth at 9.81m/s2 and account for its' weight under earth gravity.
What category of forces does gravity come under?
Gravitational force.
Can an object with mass be weightless while under the influence of gravity?
No, an object with mass will always experience the gravitational force, so it cannot be truly weightless when under the influence of gravity. Weight is the measure of the force of gravity acting on an object, so as long as gravity is present, the object will have weight.
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."
Stars are formed from interstellar clouds because of?
Because of gravity. Only gravity can pull large clouds together with enough force to overcome gas pressure.
What piece of equipment is used to measure force due to gravity?
A spring scale is typically used to measure force due to gravity. It works by measuring the extension or compression of a spring under the influence of gravity to determine the force applied.
How is weight related to the force of gravity?
Weight is the result of the force of gravity acting on an object's mass. The greater an object's mass, the stronger the force of gravity pulling on it, resulting in a higher weight. Weight is directly proportional to the mass of an object under the influence of gravity.
What is a gravitational pull also called?
gravitational force of attraction/gravity -- force -- weight -- centripetal force, under some circumstances
The allowed shapes for orbits under the force of gravity are?
ellipses, parabolas, or hyperbolas. :)
