The correct answer is a simulation.
Computer simulation of systems, or just simulation, consists of the use of certain mathematical techniques, used in computers, which allow to imitate the operation of, practically any type of operation or process in the real world, that is, it is the study of the behavior of real systems through the exercise of models.
There are several definitions for the simulation, among which we can quote Pegden (1990) who says “simulation is a process of designing a computational model of a real system and conducting experiments with this model in order to understand its behavior and / or evaluate strategies for its operation ”. In this way, we can understand simulation as a broad process that encompasses not only the construction of the model, but the entire experimental method that follows, seeking:
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Describe the behavior of the system;
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Build theories and hypotheses considering the observations made;
Use the model to predict future behavior, that is, the effects produced by changes in the system or methods used in its operation.
Answer:
Feudalism
Explanation:
The system defining hierarchical system based on land ownership, protection & mutual obligation : is called as Feudalism.
It emerged in ancient history of Europe.
It consists of nobility class (land owners), known as 'lords'. They recompense knights, vessels & serfs - by granting them piece of land (called fiefdoms) return of which the latter fight for the former.
The correct answer is crisis manager. Crisis manager is being defined as a leader who has the role of managing or taking action of having to organize unexpected events that happened in an organization by which will harm or disturb its balance.
Formula:
Hydrogen Chloride = HCl (Chemical Compound)
Sodium = Na (Chemical Element)
Reactants:
A simple definition of a reactant can be the substances that go into a chemical reaction. By substances I mean any chemical.
Products:
A simple definition of a product can be the substances produced at the end of the reaction. Again by substances I mean any chemical.
Definition of the answer:
We know that Sodium is a Chemical Element and as decribed in the picture it was mixed by Hydrogen Chloride and we know that is a Chemical Compound. So in this case the Na CI can be the product that was produced at the last and it was the result after the chemical reaction was taken place. The reactant can be the Sodium. I chose that because Reactant is a substance/chemical that goes into a chemical reaction. So as seen in the picture it went into the beaker.
Hope this helps.
Answer:
Because she cares about her sister.
Honestly, without more information there isn't a better answer.
Hope this sorta helps.