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Using a scanning tunneling microscope,Don Eigler at IBM arranged 99 iron atoms on a copper surface to form the Kanji characters for "atom." What is the total mass of iron present in grams and in atomic mass units? Assume that the Fe atoms are "average" in terms of their mass.
Independent Variable
The variable in an experiment that is manipulated by the researcher to examine its effect on the dependent variable.
Direction of Cause and Effect
Pertains to determining which variable influences the other in a cause-and-effect relationship.
Experimental Methods
Research designs involving the manipulation of variables to determine cause-and-effect relationships.
Nonexperimental Methods
Research designs that do not involve the manipulation of variables or random assignment of participants.
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