The rate of chage of displacement is called ​

Velocity is the rate of change of displacement.

Velocity

Explanation:

The rate of chage of displacement is called Velocity

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.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue

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