Answer:
The stars mass (once it becomes a star) is inversely proportional to its lifetime as a main sequence star. A red dwarf can survive for many billions of years; a star that has twice the mass of the Sun, such as Sirius A, will have 25% of the Suns lifetime.
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Explanation:
Answer:
three half-lives
Explanation:
Converting 12.5% to decimal gives 0.125
If one half life is 0.5.
0.5*0.5*0.5 gives 0.125
Thus 3-half lives has been elapsed
Sand sheets and dunes cover approximately 25 percent of the Sahara's surface.
Answer:
The best describes asbestosis is a breathing disorder caused by inhaling asbestos fibers. asbestosis is actually a chronic lung disease that causes long term breathing complications and that worst part of it is that it has no cure
Explanation:
C. Peninsula. An island is surrounded by water and an archipelago is just a collection of islands.
