Mercury has a mass of 3.3 × 1023 kg and a radius of 2439 km. Suppose that Mercury grew to its present size in 1 million years through the accretion of particles averaging 100 g each. On average, how many particles did Mercury capture each second?
A) about 67 particles per second
B) about 100 million particles per second
C) about 100 billion particles per second
D) about 3.3 × 1021 particles per second
Correct Answer:
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