Kira is creating a list of the possible ways that the strength of an electromagnet can be altered. Which of the following should Kira NOT add to her list? A. adding an insulator to the electromagnet B. creating more wire loops C. changing the current in the wire D. spacing out the existing wire loops.

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante