Aball is thrown directly up in the air from a height of 5.5 feet with an initial velocity of 65.5 ft/s. ignoring air resistance, how long until the ball hits the ground?

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.

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate