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Palash Apte

I will try and answer questions on any topic. I will not answer homework problems.

Steve Johnson

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.

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.

Recent Answers

2017-02-21 car crash, vehicle in motion hitting stationary vehicle:

All the damage?  Both cars should have sustained some damage, equal forces would have acted on both.  However, the different points of application of those forces may have caused unequal amounts of damage

2017-02-19 Do High Voltage Power Lines Cause health problem?:

I've answered this a few times, but every time it helps to go look up the latest research.  There are still no reliable studies showing an association between power line EMF and cancer risk.  Cell phones

2017-02-19 Curious:

Hello Dan,    This is a quote from  "Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has

2017-02-17 Satellites running out of fuel.:

Hello Prashant,    The type of indicators depends on the type of fuel. It could be a pressure measurement. This site  reports that "Pressure

2017-02-17 Satellites running out of fuel.:

Generally such fuels are a gas or liquid.  In the case of a tank of gas, a simple pressure sensor can tell how much fuel is in a tank.  In the case of a liquid, a thermocouple can tell how much a liquid's

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