When an object is in circular motion it is constantly changing its speed ? True or false ?

True

Explanation:

In a uniform circular motion, the speed continuously changes because the direction of motion changes

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.