Question

4. How does the chemical content of a star affect its position on the H-R Diagram?

Answer 1

Answer:

Temp, Luminosity and Mass all increase and decrease together. The vast majority of stars in the Galaxy are low-mass objects. ) are well understood and we will get back to these next section when we talk about the energy source for stars.

Explanation:

Answer 2

One of the most important ways to study star evolution is the Hertzsprung-Russell diagram (HR diagram). It plots the stars' temperature  to their brightness (the abstract HR diagram) or the colour of the stars (or spectral type), in accordance with their absolute magnitude.

Explanation:

• The chemical composition of the star determine which lines are present on the spectrum. Because evolutionary models of stars were developed in the 1930s, the relationship occurs between the mass of a star and the luminosity and radius for stars with a uniform chemical composition. This is, there is a special approach to calculate the radius and brightness of the star for a given mass and composition.
• Radius, luminosity and the whole, in In secular equilibrium, the structure of a star is unique in its mass and chemical composition. When a star is in equilibrium, it implies that the overall energy produced by the star's nuclear processes exceeds luminosity per second.
• The chemical composition of a star is determined by its original chemical composition and by the composition modifications that happened over the lifespan of the star as a result of nuclear transmutation.
• The chemical composition depends on the distance from the centre, So with the rising age of the star the differences are becoming more and more pronounced.Variations in the chemical composition at distance from the core of the star have a direct effect on the inner structure, radius and luminosity of a given star mass.
• In the HR diagram, there are three core regions/volutionary stages) of the HR diagram. The main sequence (stars spend about 90 per cent of their lives "burning" "hydrogen into helium" in their cores., that runs from the upper left (hot,luminous stars) to the bottom right (cool,faint stars) of the diagram.
• Super giant & red giant stars occupy the region above the main sequence. Stars enter this "evolutionary stage" after they exhaust the hydrogen fuel in their cores
• White Dwarf stars are the final stage of evolution of small to medium-sized stars that are located in the lower left corner of the HR line. These stars are very hot, but because of their small size they have low light.

To know  more

Which characteristics are used to classify stars on the Hertzsprung ...

https://brainly.in/question/5735988