Why was the law of universal gravitation an important contribution to the development of the concept of gravity?

Which is an example of an exothermic process?

Why does karst topography exist in some geographic location? a. few climates have enough oxygen b. most regions have rock layers other than limestone c. in most regions, the soil is too thin d. the water is too acidic enough in most places

Which is a substance that can be separated by physical means and is not the same throughout