In a very young star cluster, while the most massive stars are swelling up into giants, the least massive stars are
A) collapsing directly to white dwarfs.
B) also evolving off the main sequence as well.
C) blowing off shells as planetary nebula instead.
D) continuing to shine as stable main-sequence stars.
E) still on the zero-age main sequence.
E
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Which of the following statements is true of the protons in an atom?
A) They are electrically neutral. B) They are positively charged. C) They lack an electric field around them. D) They are made up of multiple neutrons.
Websites typically only have one goal.
Answer the following statement true (T) or false (F)
What is the mass of air in a room that measures 5.0 m × 8.0 m × 3.0 m? (The density of air is 1/800 that of water)
If an external pressure is applied to a confined fluid, the pressure at every point within the fluid increases by that amount
Indicate whether the statement is true or false