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What forces are opposing one another throughout the life of a star and how do they influence the various stages in the life cycle of a star?
During stellar evolution, gravity and stars battle with each other thought the entire lifespan of a star. Because gravity is a force that causes two particles to pull toward each other it constantly tries to collapse a star, the gas pressure of the star pushes the star outward and gravity fails in this aspect. The biggest majority of a stars life, gas pressure and gravity cohabitate in such a way that a star does not collapse under gravity or disintegrate due to gas pressure, until the end of the stars existence. When a star dies it is because of the stars mass. Stars all have different mass and because of such, low, medium and large mass stars all have very different life spans. A star that has a low mass will live longer than the other stars and can live a span of a trillion years. The stars that live this long are considered main sequence stars which means they are a continuous and distinctive band of stars that appear on plots of stellar color versus brightness. When the stars age, they begin to cool off and turn into a white dwarf star, then later to a black dwarf star. The Sun is considered a medium mass star and is believed to be able to live over 15 billion years. Medium mass stars, will spend the first 8 to 10 billion years of their lives as main sequence stars. The star needs to be fueled with hydrogen so when a medium sized star runs out of hydrogen, it will begin to burn helium, then they become red giants. As the star becomes unsteady, the outside shell of the star begins to come off and those pieces make their way out into space which makes a planetary nebula. As that medium star disintegrates, it eventually becomes a white dwarf which eventually cools off into a black dwarf. The stars that have the shortest lives are the large mass stars. Stars of this size turn into a hyper giant or a super-giant as they get older because they become so unbalanced that they begin to tear apart or blow up, becoming a supernova. When the large explosion takes place, it will leave a neutron star or a black hole behind as the large mass stars can cause a very large explosion.
What two things form a star?
One could say talent and a lot of practice. :-) The real answer begins with a force that triggers the process. From Wikipedia: "The formation of a star begins with a gravitational instability inside a molecular cloud, often triggered by shock waves from supernovae (massive stellar explosions) or the collision of two galaxies (as in a starburst galaxy). Once a region reaches a sufficient density of matter to satisfy the criteria for Jeans Instability it begins to collapse under its own gravitational force." http://en.wikipedia.org/wiki/Star The second thing is the accumulation of sufficient mass to form a star. Estimates vary on the minimum mass, but it's at least 75 times the mass of Jupiter. With that criterion met, gravitational collapse results in heat through compression of the gases. When the heat is sufficient to initiate nuclear fusion, a star is born.
What role did gravity play in the formation of the planets?
Gravity, of course has a central role in formation of planets. It's believed that the planets origin can be traced to the debris swirling around a young star. The term used for coming together of particles or bodies and joining together is 'accretion'. Gravity is the reason behind accretion . Small debris join together due to accretion and this accretion occurs further to give rise to larger and larger bodies like planets . Without gravity, this could never have occurred.
Is it possible for an object to receive a larger impulse from a small force than from a large force?
Impulse is the integral of force with respect to time. The impulse is equal to the change of momentum.Momentum = mass x change in velocity.Force = mass x accelerationTherefore, momentum = F x v /aTherefore, a small force applied for a long time can produce the same momentum change as a large force applied briefly.After all that, the answer is yes if the time period is longer.
A system of stars held together by gravity?
A sun or a star is a glowing ball of gas held together by gravity. A sun holds together a solar system of planets, so that may be the answer you are looking for.
When Inside a star the force of gravity is balanced by the?
It is balanced by radiation pressure, and gas pressure.
What Inside a star the force of gravity is balanced by the?
Inside a star, the force of gravity is balanced by the pressure generated from nuclear fusion reactions occurring in the star's core. These nuclear reactions create an outward pressure that counteracts the force of gravity trying to collapse the star. This delicate balance between gravity and pressure determines the size, temperature, and lifespan of a star.
What two forces are working against each other in a star?
In a star, the force of gravity is trying to collapse the star inward, while the pressure from nuclear fusion in the core creates an outward force, resisting the gravitational collapse. These two forces are balanced in a stable star, leading to a state of equilibrium.
Are gravity and pressure balanced or not balanced?
In the case of a star (that is not actually going nova or supernova) they are balanced.
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 is the inward force that holds a star together?
Gravity, the force of attraction between all masses in the universe, is the inward force that holds a star together.
Why doesn't a star expand or collapse during the main sequence?
A star maintains equilibrium during the main sequence because the inward force of gravity is balanced by the outward pressure from nuclear fusion in its core. This balance between gravity and radiation pressure prevents the star from collapsing or expanding significantly during this phase.
What is the inward force acting on a star?
Gravity.
What force creates a star?
Gravity is the force that causes stars to be created
How Discribe the opposing forces that act inside a star?
Inside a star, there are two opposing forces at play: gravity tries to pull the stellar material inward, compressing it, while the force of nuclear fusion in the star's core pushes outward, generating energy and counteracting gravity to maintain the star's stability. These forces must balance each other for the star to remain in a state of equilibrium.
What is the force opisit of gravity?
The opposite force of gravity is the electromagnetic force. This force is responsible for interactions between charged particles such as electrons and protons, and it can either attract or repel these particles depending on their charges.
What is the force that pulls you towards a planet or star?
gravity
