(Solved): 5. The density of aluminum is 2,700kg/m3 whereas the density of platinum is 21,450kg/m3. If we ...

5. The density of aluminum is $2,700\mathrm{kg}/{\mathrm{m}}^3$ whereas the density of platinum is $21,450\mathrm{kg}/{\mathrm{m}}^3$. If we want to make two balls with the same weight, one made out of aluminum and one of platinum, what must be the approximate ratio between the diameter of the AL ball and the diameter of the PL one? A. 8 B. $2\sqrt{2}$ C. $\frac{1}{8}$ D. 4.543 E. 2 Practice problems 6. Newton's and Law states that the sum of all the forces acting on a body is equal to the mass of the body times its acceleration. Based on this, what is unit of force? A. $\frac{M{L}^2}{T^2}$ B. $\frac{ML}{T^2}$ C. $\frac{ML}{T}$ D. $\frac{M{L}^2}{T}$ E. None of the above