Admin Table of Contents
- 1 What is the small hot extremely dense core left after a star collapses called?
- 2 What type of main sequence star is most likely to become a black hole?
- 3 When a star exhausts its core fusion fuel so that the core begins to contract Which of the following can stop the contraction?
- 4 What is formed when the core of a star is heated?
- 5 Where Do All stars begin?
- 6 What determines when a star becomes a main sequence star?
- 7 What happens to a star after it exhausts its core hydrogen?
What is the small hot extremely dense core left after a star collapses called?
A small, hot, extremely dense core left after a star collapses is a. white dwarf.
What type of main sequence star is most likely to become a black hole?
Neutron stars
What kinds of stars end up as black holes? They are the natural consequence of the evolution of massive stars. Neutron stars have an upper mass limit of 2 to 3 solar masses. A collapsed object of greater mass will continue to collapse indefinitely, forming a black hole.
What will happen to the escape velocity at the surface of a star if it collapses under the force of its own gravity without losing any mass )?
What will happen to the escape velocity at the surface of a star if it collapses under the force of its own gravity (without losing any mass)? The escape velocity will increase, as mass hasn’t changed but the density has increased.
When a star exhausts its core fusion fuel so that the core begins to contract Which of the following can stop the contraction?
When as star exhausts a fuel for fusion in its core, the core will no longer be in energy balance and therefore will contract either until it becomes hot enough to ignite fusion of another element or its contraction is stopped by degeneracy pressure. You just studied 33 terms!
What is formed when the core of a star is heated?
Once the temperature reaches 15,000,000 degrees Celsius, nuclear fusion takes place in the center, or core, of the cloud. The tremendous heat given off by the nuclear fusion process causes the gas to glow creating a protostar. As it glows, hydrogen is converted into helium in the core by nuclear fusion.
What is the origin of all stars?
Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example of such as a dust cloud is the Orion Nebula. Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction.
Where Do All stars begin?
All stars begin their lives from the collapse of material in a giant molecular cloud. These clouds are clouds that form between the stars and consist primarily of molecular gas and dust. Turbulence within the cloud causes knots to form which can then collapse under it’s own gravitational attraction.
What determines when a star becomes a main sequence star?
Stars start their lives as clouds of dust and gas. Gravity draws these clouds together. But if the body has sufficient mass, the collapsing gas and dust burns hotter, eventually reaching temperatures sufficient to fuse hydrogen into helium. The star turns on and becomes a main sequence star, powered by hydrogen fusion.
What happens when a star exhausts the hydrogen in its core?
Once a star exhausts its core hydrogen supply, the star becomes redder, larger, and more luminous: it becomes a red giant star. This relationship between mass and lifetime enables astronomers to put a lower limit on the age of the universe.
What happens to a star after it exhausts its core hydrogen?
(1) When a star exhausts the hydrogen in its core, it becomes a giant or supergiant. Once a star has used up all the hydrogen in its core, fusion of hydrogen into helium stops. The core starts to contract again (just as it contracted as a protostar, before hydrogen fusion began).