Recent content by ChemGuy

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    Does conservation of energy apply to magnetism?

    Does conservation of energy apply to magnetism? and Do magnets ever "wear" out. Do they ever lose their magnetism?
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    Why Doesn't Earth Lose Atmosphere Over Time?

    Why doesn't the Earth lose it's atmosphere eventually? I realize that gravity generally keeps the atmosphere close to the Earth but over a long period of time I would expect that we would lose some amount to the vacuum of space and the solor winds. Over millions of years we would lose it all...
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    How Do You Measure the Characteristics of a Chemical Reaction?

    Eq, this is a common situation. I'll comment on each 1) I don't understand the question because heat is heat not CO2 heat. You can calculate the heat of a reaction but it is to long to explain here 2) change in pH is pretty easy since if mixed in the correct amount all of the HCl is...
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    What is Rheopecty and How Does it Explain the Strange Behavior of Blue Clay?

    The material is termed Rheopectic and is not all that strange. It is fairly common. There is a whole field called...Rheology that studies non Newtonian fluids. See the link http://en.wikipedia.org/wiki/Rheopecty"
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    The Math You Don't Learn is Harder Still

    I take great offense to GZA when he said Chemistry is just mindless memorization. Having degrees in both Chemistry and Physics I can tell you there is just as many principles in chemistry as there are in physics. The chemistry you learn as an undergrad is a lot of memorization buy a deeper...
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    Question: Evaporation - beyond boiling point

    The is a limit to how fast heat moves through a substance if it is transferred by kinetic energy. For heat transfer by radiative means then the limit would be governed by the speed of light and the ability of material to absorb the photon and turn it into kinetic energy. There is a definite...
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    Where can I find massless string for physics experiments?

    I looked at the post thinking it was about string theory!
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    Programs What does it take to go from a BS in chemistry to a PhD

    graven I couldn't agree more. I have my MS and NEVER had a problem with employment. However I think his question is related to getting a PhD in physics. First of all it is very difficult to get a job with a physics degree. I have a BS in physics and wanted to go that route but went to...
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    Question: Evaporation - beyond boiling point

    The boiling (evaporation) of the liquid is actual an equilibrium between the liquid phase and the gas phase. The boiling point is the tempurate at which the equilibrium shifts to gas phase. The more energy you can put in the faster the equilibrium shifts. The rate of evaperation is governed...
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    The Math You Don't Learn is Harder Still

    This problem is not new. It has been a problem for years. As a student in a "good" high school (in the 80's) I specifically took classes that had been outlined as "Pre-med". I supposed it should have been pre-pre-med! It included chemistry and physics. When I graduated and went off to...
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    Calculating Time and Forces in Juggling Inside a Cone

    If there is no friction is it not the same as gravity between the two bodies. Angular momentum would be conserved. If there is no friction then it would rotate forever. The only way to remove energy from the angular momentum is to transfer it to friction. Think of how well it works with the...
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    Chill Beer to 22F Without Freezing: Physics Explained

    That is hilarious. As a chemist I have done this trick a million times...sort of. What you do is dip something in the nitrogen and freeze it solid then shatter it. Then you pour liquid nitrogen in you open hand in a manner that let's it run off your hand. No problems. Everyone is impressed...
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    Learning QM and the math required.

    I am using a "popular" book that has gotten poor reviews. It is by David McMahon. I think it got bad reviews because there are a million typo errors in it. I think it is making me look harder at each step in the solution. It does a pretty good job of explaining the steps but of course not...
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    How does Gravity travel the speed of light

    Look at the units. C= m/s; g=m/s^2. As some one said not the same. C is speed; g is acceration (change is speed over time.:smile:
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    How can someone achieve invisibility?

    :wink: I say the best way to do it is by moving a person to a different dimension. Heck string theory has a bunch left over. If you move a person there they would still be around but would be invisible in our 4 dimensions! Wait maybe you could shift someone in time by a microsecond. They...
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