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Dear Dr. Nelson,
Hello! My name is Belle and I was wondering if you could help me out with a problem. I tend to confuse myself a little. So a measure of how fast something is moving is speed, correct? So, for example, 75 miles per hour would be a speed because it is a measure of how fast an object is moving? Thank you for your time!

Yes, you have it correct, as far as the question goes.  Did you have more to ask with this question, or was the explanation like I sometimes explained to my college students (that "sometimes, it's just as simple as you think, so try not to overthink").


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Dr. Stephen O. Nelson


I can answer most basic physics questions, physics questions about science fiction and everyday observations of physics, etc. I'm also usually good for science fair advice (I'm the regional science fair director). I do not answer homework problems. I will occasionally point out where a homework solution went wrong, though. I'm usually good at explaining odd observations that seem counterintuitive, energy science, nuclear physics, nuclear astrophysics, and alternative theories of physics are my specialties.


I was a physics professor at the University of Texas of the Permian Basin, research in nuclear technology and nuclear astrophysics. My travelling science show saw over 20,000 students of all ages. I taught physics, nuclear chemistry, radiation safety, vacuum technology, and answer tons of questions as I tour schools encouraging students to consider careers in science. I moved on to a non-academic job with more research just recently.

Ph. D. from Duke University in physics, research in nuclear astrophysics reactions, gamma-ray astronomy technology, and advanced nuclear reactors.

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