You know Dr. Greenglow is a perfectionist, so you want to make certain
that your answer is right on the mark before you talk with her about
that position in her lab. You bring your calculations to one of the
other students working in the lab to check over. After studying your
work for several minutes, he tells you that you are on the right track,
but must have made an error in your math somewhere. He hands it back to
you with a smile, advising you to check your work again before bringing
it to Dr. Greenglow...
You may find it helpful to print out the page with the X-ray data on it in
order to measure more accurately. XX make a hint about measuring the right
place on the graph... XX
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