paheli noticed water being pulled by a water pump to an overhead tank of a 5 storied building. she wondered how water moves up to great night's in the tall trees

allowed for the prediction of the properties of missing elements.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.