I am a high school student and I am having some problems with some questions. I was absent for a week in my Astronomy class and I haven't been able to get some one to help me at school.
1. How many atoms in your body? (Use your body weight!)
I weigh 156 pounds, would I just multiply 156 x Avogadro number
2. How many atoms in the Sun (Hint: Mass of Sun is 2 x 1030 kg).
Would I multiply mass of the sun by Avogadro number
3. The distance between the Sun and the Earth is 1.5x108 km. How long does it take for light to travel? (Express it in unit of second, and then in unit of minutes.)