What are two categories of responsibilities?

Why is a hot water heater called a hot water heater? What is One way to determine the degree of saturation of a solid liquid solution is to drop a crystal of the solute into the solution if the crystal sits at the bottom of the container the solution is? When did Robert hooke invent his microscope? What do you mean by classification and why do you classify things? What is the advantage of dendrothermal power? What is the method of reasoning that involves using specific facts to form a conclusion A. inductive reasoning B. general reasoning C. analytical reasoning D. deductive reasoning? What was Charles Darwin's contribution to science? If a person walks 3 miles per day and substitutes riding a recumbent bike how many miles must he ride to get the same results? What are two kinds of classifying? What is the chemurgy movement and what are its goals? How do you use reason sentences? Does light pass through a compound? What are examples of Scientific Discoveries? What are the advantages and disadvantages of modern science? How many feet are in 2 inches? What should people do to recycle? What 41 degrees Fahrenheit in Celsius? When somebody says a rock has perfect cleavage what does that mean? What does jerome ( Vincent) place on the comb at his workstation? When do scientific ideas change?