Chapters 11 and 12 Homework

Chapters 11 and 12 Homework - Chapter 11 Fill In the Blank...

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Chapter 11 Fill In the Blank 1. The interstellar medium is made up of matter in the form of gas and dust . 2. To scatter a beam of radiation most effectively, a particle must be smaller in size to the wavelength of the radiation. 14. It takes a star like the Sun a total of about 50 million years to form. 15. More massive stars evolve more rapidly . Review and Discussion 9. Why do stars tend to form in groups? Because when a cloud collapse occurs, a group of stars form called star clusters. 11. What are brown dwarfs? They are “failed” stars. They never evolve beyond the proto star, so they grow cold. It is when the core temperature isn’t hot enough for nuclear fusion to occur. Chapter 12 Fill In the Blank 3. While a star is on the main sequence, hydrogen is slowly consumed in the core and ash builds up. 8. A typical white dwarf has the following properties: about half a solar mass, fairly hot surface temperature, small size, and low luminosity. 9. As time goes by, the temperature and the luminosity of a white dwarf both
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This homework help was uploaded on 04/02/2008 for the course ASTR 101 taught by Professor Caffo during the Fall '06 term at New Mexico.

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Chapters 11 and 12 Homework - Chapter 11 Fill In the Blank...

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