A runner has an original velocity of 6 m/s and slows to a final velocity of 0 m/s. If the runner covers a
1 answer:
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Answer:
Explanation:
The apparent brightness follows an inverse square law, therefore we can write:
where I is the apparent brightness and r is the distance from the Sun.
We can also rewrite the law as
(1)
where in this problem, we have:
apparent brightness at a distance
, where
million km
We want to estimate the apparent brightness at , where
is ten times
, so
Re-arranging eq.(1), we find :
5 km northeast. Left and up would make northeast
