induced current & force between 2 wires
These are 2 straight wires parallel for 3 inches. Specifically a 6AWG and 12AWG separated approximately 2 inches. A surge current enters on the 6AWG which has a rising edge of 2500A/us. This is for a...
View ArticleAny one have a diagram of the idea column shape.
It ran in Science News after much calculation the idea shape for a column to resist buckling was solved. It is a slight barrel shape.
View ArticleQuestions about AC and DC
Hey guys! Novice physics scholar here who's studying electronics on his downtime. I have some questions concerning AC and DC. If you guys could answer them (simplistically please, I still have a lot to...
View ArticleThe net force and centre of gravity of a one dimensional object
I have been trying to derive a formula for the forces acting on and the centre of gravity of objects in a one dimensional space. I've started in one dimension to make things easier and intend to move...
View ArticleAnalytical solutions for electric field of finite rectangular sheet
Hi, I have been trying to find analytical solutions for a finite rectangular sheet, say, in the xy plane, with dimensions a and b. Assume it is uniformly charged. An excellent (and short) description...
View ArticleAC Electric Neutral Current "Flow"
Hi everyone Can someone point me in the right direction here please. Happy to do the digging, but so far I can't find anything that helps! In an AC alternating-current electrical circuit, the Neutral...
View ArticleCurrent vector or scalar.. different in different books
Hello, I am a 15 year old high school student, We were being taught about current, My teacher said its a scalar quantity, I had a doubt on that that since wires bound the charges, we shouldn't say that...
View ArticleAccurate position change for accelerating objects
If an object is subject to different forces at different times and these forces are totally unpredictable (the force at any instant after the current time cannot be predicted). How would we make the...
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Pressure-temperature graph without zero y-intercept
I am a high school physics teacher and I've been trying out an experiment for my students. I used a manometer (a plastic tube in a U-shape partially filled with water) to measure the pressure of the...
View ArticleVelocity of two different species in a gas with propagating sound wave
I have a theoretical question which I would like to brainstorm, and would appreciate any assistance. Let's say sound waves are propagated through a gas, with two types of atoms with very different...
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Idea for how to break the second law of thermodynamics
Hi! I have an idea for how to break the second law of thermodynamics, and I don't see where it cracks. I would really appreciate if someone could explain this to me. Kelvin-Planck statement of the...
View ArticleFrictionless incline and required force
If I had to push a box with a certain weight 'm' up an incline, would I just need a force 'slightly greater' than 'mg'? (Assuming I applied the force parallel and up the incline)
View Articlebob mass and amplitude for a driven mechanical oscillator
This is a similar answer to a closed thread, which asked for the amplitude of a pendulum as a function of the bob's mass. The question was incompletely posed, as it didn't state whether it was damped...
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simulating diffraction in optical instruments - help settle a dispute
Consider a newtonian reflector telescope: As you can see in the image, the little secondary mirror inside the main tube is supported by an X structure called 'spider'. The four "legs" of the spider,...
View Articlefalling under gravity with decreasing r
If you drop an object from a great height with no air resistance. e.g. 1000 km above the moon. How long will it take to hit the surface? (GM[itex]_{}1[/itex]M[itex]_{}2[/itex])/r[itex]^{}2[/itex] =...
View ArticleEffective spring constant of two springs latched headon
In the Princeton Review for AP Physics, there is a question on calculating the effective spring constant when two springs are joined side by side, like so: spring 1 spring 2 |~~~~~~ ~~~~~~[mass] Their...
View ArticleRifle with one barrel and cartridge in middle
I have always wondered about equal and opposite. If I had a rifle with a cartridge in the middle of a barrel, with two projectiles, equal mass, facing in opposite directions, would the two projectiles...
View ArticleSound and supersonic motion -- a question from Feynman's lectures
In chapter 51, volume 1 of the FLP, Feynman writes Quote: Incidentally,...it turns out, very interestingly, that once [an] object is moving faster than the speed of sound, it will make sound...Any...
View ArticleTrailing mach cone
I understand why the leading edge of a projectile creates a Mach cone in front of which the air is undisturbed. But apparently the trailing edge of the projectile also creates its own Mach cone behind...
View ArticleWhat psi can be achieved from a 60mph wind
If I put vents on the hood of my car and drove at 60mph what kind of psi could be achieved? I don't care about what kind of technique is used just curious about what kind psi could be created. I...
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