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The imparfait and the passé simple are two past tenses in French but both are used differently.The imparfait is used to: describe a past action in which the time is not determined such as: "il...

You use the subjunctive in Italian when you are uncertain about what you are asking or saying, as the subjunctive means (may/might) when used by itself. You also use it when you hope or wish something, as...

Normal profit is the minimum level of profit required to maintain a firm's factors of production in their present use. It is measured by the opportunity cost of using them.
Supernormal profit is any ...

IR looks at how infrared light interacts with a molecule, measuring the vibration of atoms. Bonds are continuously vibrating and moving around, much like two balls connected by a spring. This spring syste...