Dimensional Analysis Problem

1. May 30, 2014

HSuzuki

1. The problem statement, all variables and given/known data
Assume that in interplanetary space within the solar system there is one hydrogen atom per cubic centimeter, and that the mass of such an atom is 1.67 x 10^-27 kg. In addition, take the radius of the solar system to be 4.0 light-hours. For the sake of this calculation, take the solar system to be spherical in shape. Note that we are not including the masses of the planets and the sun. Based on this set of assumptions, what is the mass of the solar system excluding discrete bodies such as the planets and the sun? Use for the speed of light 3.00 x 10^8 m/s and assume there are 3.15 x 10^7 seconds in a year.

Thanks for your attempt and help!

2. Relevant equations

3. The attempt at a solution
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution

2. May 30, 2014

Nathanael

Have you tried to solve it? An attempted solution would be nice to see so that we can help you where you need it.