In the figure, the magnitude of vector a⃗ is 18.0 units, and the magnitude of vector b⃗ is 12.0 units. what vector c⃗ must be added to the vectors a⃗ and b⃗ so that the resultant of these three vectors points in the − x direction and has a magnitude of 7.50 units?

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.