April swims 50 m north and then turns and swims 20 m back to the south.
what is her velocity if it takes her 60 seconds?

0.5 m/s north

Explanation:

Velocity is displacement over time.

v = Δx / Δt

Displacement is the difference between the final position and the initial position.  April swims 50 m north, then turns and swims 20 m south.  So her displacement is 30 m north.

v = (30 m north) / (60 s)

v = 0.5 m/s north

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.

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation