6. Two forces of 50 N and 30 N, respectively, are acting on an object. Find the net force (in N) on the object if
the forces are acting in the same direction
b. the forces are acting in opposite directions.

The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? don’t forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?