Design an experiment using a radioactive tracer to evaluate the amount of wear on steel auto engine cylinders using different types of lubricating oils.
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Think of it in terms of the scientific method. What is your hypothesis? Do you hypothesize that a certain type of lubricating oil will give less wear than a different type of oil? How can you test this hypothesis? You could try to test the oils out on different pieces of cylinders to look for the effects that they have on the cylinders. Think about what you will be observing during the experiment.