_____, the largest of Saturn's moons, has an atmosphere composed mostly of nitrogen with traces of argon and methane
A) Ganymede
B) Miranda
C) Europa
D) Titan
D
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Eris, Sedna, Quaoar, and Orcus are KBOs and therefore don't meet the definition of a planet
a. True b. False Indicate whether the statement is true or false
Which of the following statements about the stages of nuclear burning in a massive star is not true?
A) Each successive stage creates an element with a higher atomic weight. B) As each stage ends, the core shrinks further. C) Each successive stage of fusion requires higher temperatures than the previous stages. D) Each successive stage lasts for approximately as long as the first, hydrogen fusion stage.
If the accretion disk around a black hole emits X-rays outside the event horizon, the X-rays can escape
Indicate whether the statement is true or false
Describe mechanical efficiency
What will be an ideal response?