A collapsing cloud fragment that will form a star of one solar mass (like our Sun) has a mass of about:

A) 2 solar masses.
B) 10 solar masses.
C) 200 solar masses.
D) 1020 solar masses.
E) 1040 solar masses.


A

Physics & Space Science

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Approximately how many times does an average human heart beat in a lifetime?

A) 3 × 1011 B) 3 × 1010 C) 3 × 109 D) 3 × 108 E) 4 × 107

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