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1. Two stars have the same radius. The temperature of star A is twice that of star B. Compared to Star B, the luminosity of star A is

a. 2x larger

b. 4x larger

c. 8x larger

d. 16x larger

2. A star has the same surface temperature as the Sun, but it 100x more luminous. How large is the diameter of the star?

a. 10x larger than the Sun's diameter

b. 100x larger than the Sun's diameter

c. 1000x larger than the Sun's diameter

d. 10,000x larger than the Sun's diameter

e. 10x smaller than the Sun's diameter

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