# Activity for MissMulan‭

Type On... Excerpt Status Date
Edit Post #286927 Initial revision about 1 month ago
Question maxwell equation in 1d
Maxwell's first law in differential form states that $$\triangledown \cdot E = \frac{\rho}{\epsilon{o}}$$ . In case of 1d can we say that $$\rho = \lambda$$ where $$\lambda$$ is the linear charge density of something?
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about 1 month ago
Edit Post #286925 Initial revision about 1 month ago
Question Double slit experiment with 2 electrons fired from a gun
Suppose we perform the double slit experiment , but we fire instead 2 electrons instead of 1. In the double slit experiment performed in the 1920s a interference pattern was observed at the screen which showed the electron-wave nature of any subatomic particle.The particle would start moving as a ...
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about 1 month ago
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about 1 month ago
Edit Post #286923 Initial revision about 1 month ago
Question SI Units of wavefunction
What are the SI units of the wavefunction Ψ(x).I know that [Ψ(x)]^2 describes the probabilty of finding a quantum object at a certain quantum state but what about the wavefunction instead?
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about 1 month ago
Edit Post #286906 Post edited:
about 1 month ago
Edit Post #286906 Initial revision about 1 month ago
Question Differential equation solution cannot describe what happens in reality
Suppose we have a free falling object inside a planet's gravitational field with strength g.The planet's atmosphere provides a drag force which is dependant from the u^2 of the particle. Suppose the weight of the object is m1g and the drag force due to the atmosphere is -ku^2 and lets say we set k...
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about 1 month ago
Edit Post #286898 Initial revision about 1 month ago
Question Classical Uncertainty
Suppose we are using a force gauge to measure gravity in a planet. We set the gauge force to the 1N range which has a resolution of .01 N. From its specs the error introduced during the measurment at the 1N range is 210^-3reading+10^-3range. Now suppose we perform 5 different measurements: ...
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about 1 month ago
Comment Post #286873 Im looking something in the newtonian mechanics region of study which is modeled by a system of ordinary differential equations.
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about 1 month ago
Edit Post #286869 Initial revision about 1 month ago
Question System of ODEs models in physics
What examples of a system can be described by a system of ordinary differential equations?
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about 1 month ago
Edit Post #286842 Initial revision about 2 months ago
Question How are charges sorted?
Im designing a capacitor and I have decided to make the surface of 1 plate of the capacitor bigger than the other plate. Image alt text How are the charges sorted through A2?Are they spread out to cover all the surface area of the conductor (A2)?
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about 2 months ago
Edit Post #286802 Initial revision 2 months ago
Question Calculate inductance using laws of electromagnetism
Get 2 conductors and seperate them we can use Gauss's law to calculate the capacitance created by the seperation of the 2 conductors.Can we use other laws of electromagnetism to calculate the inductance of a piece of wire just like we used Gauss's law to calculate the capacitance of the 2 seperated c...
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2 months ago
Edit Post #286695 Question closed 3 months ago
Edit Post #286695 Initial revision 3 months ago
Question Meaning of complex frequency
If we have a LC high pass filter the transfer function H(s) becomes: $$H(s) = \cfrac{sL}{sL + \cfrac{1}{sC}}$$ If we solve for s to find a pole of the transfer function we get: $$s = j \cfrac{1}{\sqrt{LC}}$$ In the case of a sinusoidal input signal = $s = j \omega \rightarrow \omega ... (more) 3 months ago Edit Post #285688 Initial revision 8 months ago Question Conductivity with angle of light In the lab I changed the angle the light hits a photoresistor and it doesnt obey Lambert's cosine law the conductivity of the photoresistor drops fast from +-20 to +-30 degrees angle.Why? (more) 8 months ago Edit Post #284165 Initial revision about 1 year ago Answer A: Is it plausible to desire a "universal" calendar applicable everywhere in our universe? I dont think anyone can make a universal calendar because time flows more slowly or more fast between different regions in the universe or it can even go backwards if you come close to a rotating black hole. And a planck unit of time is not the smallest amount of time ,the planck time is defined a... (more) about 1 year ago Edit Post #283743 Initial revision about 1 year ago Question Superconductivity In my notes from University the reason a material can exhibit superconducting properties is at really low temperatures electrons form Cooper pairs of which the electrons of the Cooper pairs have lower energy than if they were in the conduction band so which means that they dont collisions with the ca... (more) about 1 year ago Comment Post #283395 @#8056ts we should make this a new question. (more) about 1 year ago Comment Post #283395 @#8056ts we should make this a new question. (more) about 1 year ago Comment Post #283395 Olin photons can't accelerate like most of the objects because photons always move with one speed for all inertial frames. (more) about 1 year ago Comment Post #283393 But how can we find x(t) from F(r) since they have different arguments? (more) about 1 year ago Edit Post #283392 Initial revision about 1 year ago Answer A: Why we can't find a particle accelerating unless there's some other particle accelerating somewhere else? > But, when we are walking, running. We are accelerating. Wrong.When you are walking you're moving at a costant speed. > The third law says we will never find a particle accelerating unless there’s some other particle accelerating somewhere else The book says that because of Netwon's 3r... (more) about 1 year ago Edit Post #283386 Initial revision about 1 year ago Question Find position of a particle at a time If we have a force which changes depending on the position of a particle, how can we find the position of the particle at some time$t\$? We can find its velocity if it has travelled a given distance $$\int^{rf}{ro} F(r)dr = \frac{1}{2} \cdot mp(uf^2 - uo^2)$$ but this equation doesn't inv...
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about 1 year ago
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about 1 year ago
Edit Post #283251 Post edited:
about 1 year ago
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about 1 year ago
Comment Post #283251 I will edit the question then
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about 1 year ago
Comment Post #283251 It is an exercise the gravitational field exists only for some r below a limit and a test particle enters somehow(pops into existence) at the edge of the field.
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about 1 year ago
Comment Post #283251 It is a exercise it is not the real deal. The gravitational field only exists for some r below a limit.
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about 1 year ago
Comment Post #283009 I am assuming for simplicity the B field becomes 0 after the particle reaches the end of the wire.
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about 1 year ago
Edit Post #283259 Initial revision about 1 year ago
Answer A: Signal modeling as only digital, only analogue, or as both
If a signal has a analog component then it analog regardless of if it has a digital component.
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about 1 year ago
Comment Post #283258 I don't think this has anything to do with physics.
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about 1 year ago
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Comment Post #283251 And i have something else in my mind lets just say the initial acceleration is 0.
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about 1 year ago
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about 1 year ago
Comment Post #283251 HDE 226868 you are correct i will edit
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about 1 year ago
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about 1 year ago
Edit Post #283251 Initial revision about 1 year ago
Question Find jerk of time varying force
This gravitational field we move inside has some distance L after which it becomes 0.Before L it is just like any gravitational field. Suppose we move inside that gravitational field.The acceleration we experience depends on the distance from the planet. $$a\sim\frac{1}{r^2}$$ At t=to we enter t...
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about 1 year ago
Edit Post #283009 Initial revision about 1 year ago
Question Motion of charged particle inside a magnetic field
We have place a charged particle of 2C with mass 2kg, 1mm above a current-carrying wire of 1A.The charged particle has an initial velocity of 100m/s The magnetic field of the wire for simplicity will exist as long as we are only over the wire. How can we find the equation of motion of the p...
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about 1 year ago
Edit Post #282727 Initial revision about 1 year ago
Question Magnetic charges to solve interaction between 2 magnetic dipoles
Suppose we have an electric dipole of charge Q+ and Q-.The charges of the dipole are fixed (they cant move closer to each other than they already are).If we place a test particle at some distance r from the electric dipole it is pretty straight forward we calculate the electric force between each of ...
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about 1 year ago