Suppose a star has the same luminosity as our Sun (3.8x1026watts3.8x1026watts) but is located at a distance of 10 light-years. What is its apparent brightness?

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A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

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A: Use kinematic expression to find the time elapsed v=u+att=v-ua=27.4 m/s-9.4 m/s3.8 m/s2=4.74 s

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