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location The South
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visits member for 2 years, 3 months
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Jan
27
comment What is an Electron?
@Ciwan What you really must accept is that we'll never understand the most fundamental stuff we know of in terms of more fundamental stuff. Even if we discovered that electrons are not fundamental and they're actually made up of tiny little electrinos, you'd just be back in the same boat asking me what the heck are electrinos.
Jan
27
comment Application of $E = mc^2$
What do you mean be "pure energy state"?
Jan
26
comment Motion of objects (beginner)
Yes, though I'd recommend being more specific: the motion is uniformly rectilinear.
Jan
26
comment Motion of objects (beginner)
The curves traced out by the reflectors do not have semi-circlular parts. The curve is called a cycloid. en.wikipedia.org/wiki/Cycloid
Jan
22
comment Because position is relative, is it possible to see a star orbiting a planet?
The Sun is orbiting Saturn as we speak.
Jan
21
comment Reunion condition in the Twin Paradox
The condition for reunion is that both twins have the same spacetime coordinates. This is true whether you are talking about Newtonian physics or relativistic physics.
Jan
18
revised Is the concept of a field necessary to electrodynamics?
fixed grammars
Jan
18
answered Is the concept of a field necessary to electrodynamics?
Jan
17
comment Why aren't quarks free?
Your first question is maybe one of the top ten unsolved problems in physics at the moment. No one knows yet. Some physicists are hopeful that string theory will solve answer this question, assuming we ever figure out how to test string theory.
Jan
16
answered Capacitance and energy
Jan
16
comment Axis of reflection in a mirror
Richard Feynman explains it best, as usual. youtube.com/watch?v=msN87y-iEx0
Jan
16
comment Should I learn Classical Physics if I want to learn Quantum Physics?
A better question is CAN you learn quantum physics without learning classical physics?
Jan
15
comment A basic question: what is accelerating voltage?
Context? Also, is this what you're referring to? en.wikipedia.org/wiki/Acceleration_voltage
Jan
12
revised Heisenberg uncertainty principle and minimum energy
Corrected spehling
Jan
12
comment How is a standard unit divided into equally smaller or fractional units physically/experimentally?
The OP should really consider fleshing out this question some more, to better facilitate a more targeted response. The yearly publications from the NIST on measurement standards is a testimony to just how much can be written on the subject if a person is of a mindset to do so.
Jan
12
answered Heisenberg uncertainty principle and minimum energy
Jan
11
answered Show that the electric field, $\mathbf{\vec{E}}$ cannot be generated by any static distribution of charges
Dec
31
comment What is empirical mean of centripetal acceleration
Suppose you have a point moving along a circle. The point's distance from the center never changes, yet it's velocity is non-zero. What gives?
Dec
31
comment Why is a proton assumed to be always at the center while applying the Schrödinger equation?
@RajeshD The assumption that the proton is stationary is just an approximation used since protons are about 2000 times as massive as the electrons and 2000 is approximately infinity.
Dec
20
comment Correction to Period of a Pendulum
The variable $\theta$ represents the angle of the pendulum as a function of time. $\theta_0$ is just the initial angle at $t=0$.