The diameter?

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The diameter of the Milky Way disc is approximately 9 x 10^20 meters. How long does it taake light, traveling at 10^16 m/year to travel across the diameter of the Milky Way?

Can some body please help me with this?

2007-01-25 22:33:54 · 3 answers · asked by richardsonlover12 1 in Science & Mathematics ➔ Physics

3 answers

simple answer is 9 x 10^4 years

2007-01-25 22:42:53 · answer #1 · answered by Mysterious 3 · 0⤊ 0⤋

Divide the big number by the little number. If I remember correctly, when the numbers are as convenient as the ones you have, you can do this by subtracting the exponents.... 20-16 = 4 ....so 10*4 years.... i

2007-01-26 06:42:04 · answer #2 · answered by cato___ 7 · 0⤊ 0⤋

got to discovery.com on line I'm sure they have or know the answer!

2007-01-26 06:41:32 · answer #3 · answered by TJ 3 · 1⤊ 0⤋