A statistical measure often used in survey research that indicates the extent to which changes in one factor are accompanied by changes in another is called a (n) A- replication
B- independent variable
C- dependent variable
D- correlation coefficient

Which of the following changes will result in a stronger electromagnet? a. using fewer coils of wire b. using a higher voltage c. using a shorter nail d. using a longer wire

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve

What is the role of lenses in microscopy?