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Why is the presence of large amounts of helium in the spectrum of a star generally considered to be asign of age?
When stars form they are mostly made up of hydrogen.
Main sequence stars derive their energy from converting hydrogen in helium in the cores. As the star ages the ration of helium to hydrogen increases. A star with a lot of helium there for must be old.
When the hydrogen has exhausted in the core the star begins to collapse due to gravity until it reaches a point that the temperature of the core is sufficient to fuse Helium into Carbon.
What else can I help you with?
Why is the presence of large amounts of helium in the spectrum of a star generally considered a sign of age?
Stars begintheir lives burning hydrogen and converting it to helium. If there are large amounts of helium in a stellar spectrum, it would indicate that the star has been making helium for a long time - hence age.
How do raindrops produce a spectrum?
Rain droplets can refract light. Different colours refract in different amounts so a spectrum is produced.
Is decaf coffee bad for kids?
Decaf coffee is generally considered safe for kids in moderation, as it contains very little caffeine. However, it is still recommended that children consume decaf coffee in limited amounts due to other potential health concerns, such as the presence of chemicals used in the decaffeination process.
Is Francium found underwater?
In the nature francium exists only in infinitesimal amounts and because of this, it is considered generally an artificial element. Francium reacts with water.
What is the significance of the presence of excessive amounts of bilirubin in feces?
pangit
Is carob bean gum bad for you?
Carob bean gum is generally considered safe for consumption and is not known to have harmful effects on health when consumed in moderate amounts.
Is floc dangerous if consumed?
No, floc is not dangerous if consumed in small amounts. It is commonly used in water purification processes and is generally considered safe. However, ingesting large amounts of floc could potentially cause stomach discomfort.
Is sulfur toxic to humans?
Inhaling sulfur fumes or dust can irritate the respiratory system, while ingesting large amounts of sulfur can cause gastrointestinal upset. However, sulfur is commonly used in small amounts in food and medicine and is generally not considered toxic to humans.
Is 20mm a lot of rain?
It can be considered a significant amount of rain depending on the context. In general, 20mm of rain in one day is considered a moderate amount for most regions, but it may be considered a lot in areas that typically receive lower amounts of rainfall.
Is hamsters wee poisonous?
No. It is concentrated, but urea is considered generally non-toxic, needing extremeley large amounts to cause damage. Far more than a hamster can produce.
Do you have to pay taxes on pensions?
Generally...yes, sometimes only on a part of it though. Again, generally, the amounts contributed and/or the amounts earned on the investments, were NOT taxed originally.
Is fluorine in apples?
Yes, apples can contain trace amounts of fluorine, primarily absorbed from the soil and water in which they grow. However, the levels of fluorine in apples are typically very low and not considered significant in terms of dietary intake. The presence of fluorine in apples is generally not a concern for health, as the concentrations are far below levels that would pose any risk.
