At what point does the accretion process turn a clump of debris into a planetesimal?
What will be an ideal response?
When its gravity and mass are sufficient to pull on neighboring debris.
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As per the turnoff point in the cluster H-R diagram, the oldest open clusters in the Milky Way have ages of about _____
A) 2 to 4 billion years B) 5 to 7 billion years C) 9 to 10 billion years D) 12 to 13 billion years
The type of fuel created in the breeder reactor is
A) uranium-238. B) cow dung. C) plutonium. D) uranium-235. E) deuterium.
For an eye that is 2.4 cm in diameter, what must be the range of focal lengths of the lens to focus objects from the near point (25 cm) to infinity on the retina?
What will be an ideal response?
What is the potential difference VB ? VA when I = 0.50 A in the circuit segment shown below?
a.
+28 V
b.
+2.0 V
c.
?28 V
d.
?2.0 V
e.
+18 V