Why should batteries be stored when is not being used?

batteries should be stored because when if theres a emergency it can be used directly.

batteries should be stored because when if there is a a emergency it can be used directly.

Explanation:

the answer is   c.) 1575 j.

explanation:

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.