there are two questions I'm working on for astronomy and I can figure them out.?

Jennifer Prame

New member
these are the two questions that I dont know how to do if someone could help me that would be great.

1.Sun's surface at 5800 K is ________ times brighter than sunspot at 4200 K

2.Let us assume that average energy consumption for US remains about 1020 Joule/Year, for long term future.
Energy of typical solar flare is 1025 J, if tapped somehow, will power US ___________ years.
 
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