Saturation Pressure and Reactor Pressurizers
How does the steam bubble, in the top of a pressurized nuclear reactor pressurizer get there? Is there air in the entire coolant loop? When you fill the coolant loop with water, do you leave some...
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idea gas law applied to throttling process
Hi all. I'm trying to become acquainted with thermal dynamics. I thought I had a fairly good handle on the idea gas law, PV=nRT, or PV=mRT, but I came across a problem involving the throttling of an...
View ArticleThe importance of reversible processes(?)
In thermodynamics(at least in classical thermodynamics),the idealization of reversible processes is used time and again.Can we say it is central to thermodynamics? I mean can we say it is so important...
View ArticleThermodynamics of exothermic reactions in hand warmers
I was reading online about the reactions used in hand warmers. One website that their version always heats up to 54 C (http://www.heatinaclick.com/Default....0&PageId=81390). This one works by a...
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Understanding ray diagrams for concave lenses
Hey guys, So some friends and I are studying for a test and we came across this question. I've absolutely no idea what the answer is simply because every website I've found only shows parallel rays and...
View ArticleFinding the RPM of a CD?
In this video, a CD accelerates until it breaks: http://www.youtube.com/watch?v=jnyDwPWGkCY Here is one comment: Quote: Plotted a small segment of audio just before pop in Audacity...
View ArticleVerifying ohm's law
How was Ohm's law ever verified? To verify it you need to measure the current, voltage and resistance over a range of values and show that ohms law satisfies their solution. The catch is that typical...
View ArticleGreen's function?? Physical interpretation??
Hi friends.. Can anyone help me to understand the physical interpretation of the green's function with help of some physical application example such as that from electrostatic?? I am unable to...
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Level Detection for Formaldehyde Reactor
If you look on the attached pictures, one is a basic sketch of system with the vessel on the right being formaldehyde reactor that uses an HTF, therminol with a SG of .845 at 293 degree C, which is...
View ArticleExact solution of heat conduction equation
Hi all, I am trying to find the exact solution of the 3D heat conduction equation. The problem I have is I have infinite large 3D body. Then the initial condition is : in the center it is a constant...
View ArticleHow do I calculate the maximum rotational speed of a hollow cylinder?
Hello! How do I calculate the maximum possible rotational speed of a thin walled hollow cylinder? In other words, at what rotational speed will it explode due to centripetal force? This picture shows...
View ArticlePassive Adiabatic Effect: Cold sky reflection on IR imagery.
I am currently in training to become an analyst using thermal imagery. In the studies I have been introduced to cold sky reflection on thermal imagery, however the instructor explained it as a surface...
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High School Rocket Project
I am a high school teacher attempting to give my students a project for designing a rocket powered by the chemical reaction between acetic acid and baking soda to produce CO2 gas. I have done some...
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What is this old aparatus?
I'm a student teacher, practicing some physics teaching in a new classroom with old stuff in it. My teacher associate and I can't figure out exactly what this thing is. There's a coil, with a small...
View ArticleQuestion on Gravity
How would the size of the force exerted by Earth’s gravity on an object (lets say... a pencil) compare with the size of the force the pencil exerts on the Earth? I'm pretty sure that the forces would...
View ArticleThe fate of the vector potential in the case of the existence of a mag
The vector potential in classical electrodynamics can be introduced due to the fact that the magnetic field is the vortex: [itex]div \vec B = 0 → \vec B = rot \vec A[/itex] In the four-dimensional form...
View ArticleForce that changes mass?
I was thinking about Newton's law. The case of changing mass is often ignored outside the textbook rocket problems. Are there and examples of the effect of an external force is to change the rest mass...
View ArticleRefractive Index of a metal
When a light wave of the form E=E0eiω hits the surface of a metal, the refractive index if given(considering restoring force of metal atoms and damping equal to 0), by n2=1-p2/ω2 where p=plasma...
View ArticleThe form of gravitational potential energy
http://www.scholarpedia.org/article/...tial_Mechanics In this source, the gravitational potential energy is given as [itex] \frac{-MmG}{r}-\frac{mmG}{r}[/itex], seeming to imply that the...
View Articlemeaning of Square of four vector potential
The square of the four vector potential. [itex](\phi,A)^2=\phi ^2 - A^2[/itex] What's the physical meaning of this lorentz invariant?
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