What effect does the eyepiece have on the magnification of a compound light microscope?

Which one of the following research methods can show cause and effect

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above