Velocity is a physical vector quantity; both magnitude and direction are needed to define it. The scalar absolute value (magnitude) of velocity is called speed, a quantity that is measured in metres per second (m/s or mâs â1) in the SI (metric) system.or example, 5 metres per second is a scalar (not a vector), whereas 5 metres per second east is a vector. If there is a change in speed, direction, or both, then the object has a changing velocity and is said to be undergoing an acceleration.
The duck bill is the result of unnatural overfill in the upper lip. It is make worse when volume is placed in the lip about the vermillion lip edge. The key is to appreciate that only a certain amount of volume is acceptable in a given lip.
The cysts are thought to be caused by sucking the lip membranes between the teeth. Mucous cysts are harmless. Left untreated, they can form a permanent bump on the inner surface of the lip. When mucous cysts occur on the floor of the mouth, they are called ranula. When they occur on the gum, they are called epulis. Mucous cysts may form around jewelry (piercings) on the lips or tongue. A thin, fluid-filled sac appears on the inside of the lip. The sac is bluish and clear. It is painless, but it can be bothersome. The sac can also occur on the tongue, palate, inside the cheeks, floor of the mouth, or around tongue or lip piercings.