Answer:
Reflective
Explanation:
The radiation pressure of the wave that totally absorbed is given by;

and While the radiation pressure of the wave totally reflected is given by;

Now compare the two-equation you can clearly see that the pressure due to reflection is larger than absorption therefore the sail should be reflective.
Answer:
Explanation:
horizontal is zero slope, and the vertical is undefined
Density =mass/volume
density= (0.044kg/(11 x10^-6)
4000kg/m^3