A distance of 0.44 m separates a wave crest from a trough and the vertical distance from the top of the crest to the bottom of the trough is 0.14m. What is its
wavelength?

While carrying a heavy box up the stairs,you set the box on a step and rest. then you pick up the box and carry it to the top of the stairs. describe these actions in terms of balanced and unbalanced forces acting on the box.