The apparent brightness of the bright springtime star
The apparent brightness of the bright springtime star Arcturus is 3.0 x 10^-8 watts/square meter. If Arcturus is 10 parsecs away, find the luminosity of Arcturus in watts.
Note: One parsec is equal to 3.1 x 10^16 meter
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the apparent brightness of the bright springtime star arcturus is 30 x 10-8 wattssquare meter if arcturus is 10
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