Acertain rock has a mass of 125 g. the rock is gently lowered into a graduated cylinder whose water level is 250 ml. when the rock is completely submerged, the water level rises to 300 ml what is the volume of the rock?

b

explanation:

mitosis

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.

answer; talc and gypsum;

it is stable as it is in group 0 which have full outer shells of electrons