What is the percent activity of a radioactive sample (relative to its original activity) that has undergone four half-lives of decay

Mrs. smith ordered a root beer float (vanilla ice cream + root beer). mrs. smith noticed that the three states of matter (solid, liquid, and gas) all existed simultaneously in her root beer float. a. identify each phase of matter in the root beer float. b. describe the particles of all three phases of matter in the root beer float. (how are the particles arranged and moving? ) c. identify one phase change you would see in a root beer float and described what causes this change.

What are four significant sources of ghgs that come from wostem washington?

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?