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| bio | website | mathandcode.com/portfolio |
|---|---|---|
| location | ||
| age | 19 | |
| visits | member for | 8 months |
| seen | May 14 at 22:47 | |
| stats | profile views | 16 |
I'm an undergrad.
http://www.mathandcode.com/portfolio/ http://www.youtube.com/dkm101
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Feb 4 |
comment |
Thought experiment regarding an object approaching a mirror Another interesting thing to consider is the frequency of the light due to doppler shifts. Think if you view the situation where superman is stationary and the mirror moves at $2*10^8$ m/s. The assumption that in the mirror's frame light is emitted and absorbed at the same frequency should hold. You get $\tau_{\text{mirror}}=\gamma(1-\beta)\tau_{\text{superman}}$, $\tau_{\text{superman}}'=\gamma^2(1+\beta)(1-\beta)\tau_{\text{superman}}=\tau_{\text{superman}}$. ($\tau$ being period) So you can ignore relativistic doppler shifts with moving mirrors? Neat'o! |
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Jan 21 |
answered | where the proper time is invariant why $d\tau$ is not zero? |
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Jan 13 |
answered | Measuring work done by gravity over non-constant gravitational acceleration |
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Jan 13 |
awarded | Teacher |
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Jan 13 |
answered | Power of a runner |
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Jan 12 |
comment |
Simulation of physics of chains/ropes in force fields resources? Oh jeez, "asked may 30 '11"... my bad. (well, other answerer's bad x) |
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Jan 12 |
comment |
Simulation of physics of chains/ropes in force fields resources? I made a simulation of a bungee jumper on a chain (in order to graph acceleration) youtube.com/watch?v=ZWkjfVG4PhQ there's source code linked in the description, but I must warn you: It's in [a variant of] BASIC, and I didn't spend a huge time on physical accuracy. (the method used to solve it is simple. Take a bunch of particles with position/velocity, have some function apply a force to the particles based on their relative positions and what-not, and then integrate. There're elasticity and damping forces.) |
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Jan 12 |
answered | Do spheres exist in nature? |
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Dec 13 |
awarded | Citizen Patrol |
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Nov 12 |
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Is there any law that prevents an object with mass to become massless? Ah, I see. Thanks |
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Nov 12 |
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Is there any law that prevents an object with mass to become massless? In the second sentence, it might be helpful to specify that the rest mass can be zero. |
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Nov 12 |
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Have I discovered how to calculate the proton's mass using only integers? math.sjsu.edu/~hsu/courses/126/Law-of-Small-Numbers.pdf comes to mind. |
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Nov 2 |
awarded | Supporter |
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Oct 13 |
comment |
Can a universe emerge from nothing? paraphraphrasing something I heard somewhere in a popular account of string theory, "Nothingness is unstable". Unfortunately I wasn't able to find any useful references. |
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Sep 13 |
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Does juggling balls reduce the total weight of the juggler and balls? Although... if you toss a single ball in to the air really high, step on to the bridge, run across really fast, and catch the ball on the other side, you could make it! |
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Sep 8 |
comment |
Calculating kinetic energy? Although, what you might be getting at would be that $E_{kinetic}=\int v_{vertical}mg \cdot dt$, which is identically $E_{kinetic}=mgh$. If you don't know calculus, the equation $dE_{kinetic}=v_{vertical}mg \cdot dt$ might make more sense. Because v changes over time, you can only say that "h=v*dt" over very small values of "dt", so this gives you a very small portion of energy, and when you add all the tiny portions of energy together you get the correct result. |
