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You are watching: The lowest mass object that can initiate thermonuclear fusion of hydrogen has a mass of about




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In the core of a main sequence star, gas pressure _____ the weight of the overlying materials.a. Is less thanb. Is better thanc. Balances
energy can flow outward native the cores of different kinds that stars bya. Conductionb. Convectionc. Radiationd. All of the above
The key sequence has a border at the lower end becausea. Low mass stars kind from the interstellar medium really rarely.b. Hydrogen fusion combined 4 hydrogen nuclei to type 1 helium nucleus.c. Push does not rely on temperature in degenerate matter.d. The reduced limit represents when the radius that the star would be zero.e. Over there is a minimum temperature for hydrogen fusion.
The lowest mass thing that can initiate thermonuclear fusion of hydrogen has actually a mass of abouta. 1 Mb. 60 Mc. 0.5 Md. 0.08 Me. 0.001 M
together a star prefer the sun exhausts hydrogen in the core, the external layers the the stara. Become hotter and much more luminous.b. Become cooler and much more luminous.c. Become hotter and also less luminous.d. Become cooler and also less luminous.e. End up being larger in radius and hotter.
Giant and also supergiant stars room rare becausea. They execute not type as frequently as key sequence stars.b the giant and supergiant stage is unstable.c. The giant and also supergiant phase is really short.d. Helium is really rare.e. Helium flash destroys countless of the stars before they can end up being giants and supergiants.
i beg your pardon of the following nuclear fuel does a one solar mass star usage over the food of its whole evolution?a. Hydrogenb. Hydrogen and also heliumc. Hydrogen, helium, and carbond. Hydrogen, helium, carbon, and also neone. Hydrogen, helium, carbon, neon, and oxygen
which of the following nuclear fuels does a 0.2 solar fixed star (red dwarf) usage over the food of its whole evolution?a. Hydrogenb. Hydrogen and also heliumc. Hydrogen, helium, and also carbond. Hydrogen, helium, carbon, and also neone. Hydrogen, helium, carbon, neon, and also oxygen
In the diagram above, which place would suggest that of the sunlight as that approaches finish of hydrogen burn in the core?a. 1b. 2c. 3d. 4e. 5
In the diagram above, situate the position of our sunlight after it has actually commenced helium burning and has end up being a red giant.a. 1b. 2c. 3d. 4e. 5
In the diagram above locate the position of red dwarf stars the will never burning facets heavier 보다 hydrogen in their cores.a. 1b. 2c. 3d. 4e. 5
open up clusters often tend to be __________________ 보다 globular clusters.a. Younger and contain fewer starsb. Younger and also contain more starsc. Older and also contain fewer starsd. Older and contain more starse. An ext luminous and cooler
What must occur for things to be thought about a key sequence star?a. Hydrostatic equilibriumb. Nuclear blend reaction in the corec.. Protostar life beginsd. Both a and also b.
Why do higher mass stars live much shorter lives on the key sequence than lower mass stars?a. Higher mass stars burn with their atom fuel faster.b. Reduced mass stars don’t get their energy from that exact same nuclear fusion source as greater mass stars.c. Greater mass stars have less hydrogen fuel come burn.d. Lower mass stars invest a much longer time evolving come the main-sequence.e. All of the over are false.
The lowest-mass stars cannot end up being giants becausea. They do not save helium.b. They revolve too slowly.c. Lock cannot warm their centers hot enough.d. Lock contain solid magnetic fields.e. They never ever use up their hydrogen.
A planetary nebula isa. The expelled outer envelope that a tool mass star.b. Produced by a supernova explosion.c. Produced by a nova explosion.d. A nebula within which planets are forming.e. A cloud of warm gas neighboring a planet.
A white dwarf is created ofa. Hydrogen nuclei and also degenerate electrons.b. Helium nuclei and normal electrons.c. Degenerate matter..d. Degenerate iron nuclei.e. A helium burning core and also a hydrogen burning shell.


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