According to the general theory of relativity, what are consequences of the curvature of space-time? Check all that apply.
the dilation of time
the falling of objects
the contraction of length
the constancy of the speed of light
the changing of paths of light

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.

you need to have a picture of the atom that way we can answer it