50 m/s north is an example of...
O Motion
O Constant Speed
O Acceleration
O Velocity

the five characteristics of adolescence are biological growth and development, and undefined status, increased decision making, increased pressure and the search of self.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.