Which quantity is a scalar quantity

The diagram shows a series of volcanic island and a hot spot determine the direction of movement of the tectonic plate that for the island

1. explain how you calculate the net force in any direction on the box. 2. suppose an upward force of 15n is added to the box. what will be the net vertical force on the box? 3. what force could be applied to the box to make the net force in the horizontal direction zero? explain. 4. suppose a force of 25n to the right is added to the box. what will be the net force to the right?

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency