Physics/Expert Profile
Expertise
I would be delighted to help with questions up through the first year of college Physics. Particularly Electricity, Electronics and Newtonian Mechanics (motion, acceleration etc.). I decline questions on relativity and Atomic Physics. I also could discuss the Space Shuttle and space flight in general.
Experience in the area
I have a BS in Physics and an MS in Electrical Engineering. I am retired now. My professional career was in Electrical Engineering with considerable time spent working with accelerometers, gyroscopes and flight dynamics (Physics related topics) while working on the Space Shuttle. I gave formal classroom lessons to technical co-workers periodically over a several year period.
Education/Credentials
BS Physics, North Dakota State University
MS Electrical Engineering, North Dakota State University
What do you like about this subject?
I went into Physics because it was the first material I both liked and understood in high school. I did well in my first year of college Physics, but the later years required higher math than my comfort level so after earning my BS degree in Physics, I switched into Engineering for my MS degree.
Average Ratings
Recent Reviews from Users
K = Knowledgeability C = Clarity of Response T = Timeliness P = Politeness| User | Date | K | C | T | P | Comments |
|---|---|---|---|---|---|---|
| john | 11/23/09 | 10 | 10 | 10 | 10 | thank u sir for answering my querie ..... |
| Rita | 11/22/09 | 10 | 10 | 10 | 10 | Tried to help with a difficult quesion |
| sanaz | 11/13/09 | 9 | 10 | 9 | 10 | i dont know how to thank you ..... |
| Brittany | 11/09/09 | 10 | 10 | 10 | 10 | Thank you so much you are a ..... |
| Rehan | 11/05/09 | 10 | 9 | 10 | 10 |
Recent Answers from Steve Johnson
2009-11-21 Physics:
Hello Ugochukwu, This looks like an iron nucleus but I think you gave the radius and separation wrong. I will assume you meant to give me r = 4*10^-15 m. a) The repulsion between those 2 protons
2009-11-20 radiation:
Hello john, Your question indicates some error in your thinking about the meaning of the term medium. But it also seems that your book stretches the truth a little bit. A common example of the term
2009-11-19 inclined frictionless plane minimizing travel time:
Hello Rita, I have some problems understanding your question. I used my best guess and rewrote the problem. This is the question I will answer. If I totally misunderstood the problem, feel free to send
2009-11-18 centre of mass:
Hello trishant, That would be a strange outcome if the bullet doesn't emerge on the path it was on when it was in the barrel. I'm not a student of guns, but I believe the sights are sometimes intentionally
2009-11-17 Uniform Circular Motion:
Hello Nathan, In order for the car to follow the circular track, it needs to have centripetal (meaning pointed towards the center) force, Fc, given by Fc = m*v^2/r If you remember Newton's 1st, the
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