UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER
11th Edition
ISBN: 9781319278670
Author: Freedman
Publisher: MAC HIGHER
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Chapter 20, Problem 73Q

(a)

To determine

The factor that makes the planetary nebula and supernova remnants glow.

(b)

To determine

The two kinds of gas clouds which continue to glow for a longer period and also give its reason.

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Why does a type Ia supernova explode? in two sentences.
The ring around SN 1987A (see the figures below) initially became illuminated when energetic photons from the supernova interacted with the material in the ring. The radius of the ring is approximately 0.75 light-year from the supernova location. How long (in years) after the supernova did the ring become illuminated?
In a star of 1 solar mass (M☉), the core hydrogen burning phase, also known as the main sequence phase, lasts for approximately 10 billion years. Suppose there's a star of 15 solar masses (M☉). Stars of higher mass burn through their hydrogen at a faster rate, following an approximate relation that the lifetime of a star on the main sequence (T) is proportional to its mass (M) raised to the power of -2.5 (T ∝ M^-2.5). Calculate approximately how long this 15 solar mass star would remain in the main sequence phase, compared to the 1 solar mass star.

Chapter 20 Solutions

UNIVERSE LL W/SAPLINGPLUS MULTI SEMESTER

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