Which of the following best characterizes the field of chemistry, a) scientific study of the laws of nature and the origin of all the things around us b) scientific study of matter and how materials interact with each other at the atomic level c) scientific study of how celestial objects move?

Most short-period comets do not have randomly oriented orbits because

What is the major limitation to the light microscope?

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.