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Armani Rush
25 November, 07:31
Why is a convex lens useful for starting fires
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Cyrus Swanson
25 November, 08:34
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because if you were stuck on an island and you had a bag of of stuff and you also had a convex lens in there it could be good if u can't start a fire by rubbing to sticks instead you can use the convex lens to start a fire
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