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Jan
24
awarded  Popular Question
Jan
8
comment Why can we assume, when dealing with tension, that the mass of a rope is $0$ but still assume that there are forces on it?
If you want to account for the mass (really weight) of the rope, then you would just integrate those equations over the length of the rope.
Nov
29
comment Shape of an inverse cube orbit?
Steven, thank you for the answer, but r'' is not the acceleration in this case.
Nov
28
awarded  Self-Learner
Nov
28
comment General Solution to Linear Schrodinger equation
Do you have mathematica?
Nov
28
comment Shape of an inverse cube orbit?
@Rol That's what I ended up doing...
Nov
28
answered Shape of an inverse cube orbit?
Nov
27
comment Shape of an inverse cube orbit?
Wait, r'' is NOT the acceleration because we need the centripedal acceleration. r'' in this case really means nothing.
Nov
27
comment why don't large magents repel themselves
The second picture got the point across to me really well.
Nov
27
asked Shape of an inverse cube orbit?
Oct
28
comment Perception of Depths and Stereovision
When you close one eye you still have some depth perception because you have a reference already for what depth should be. If you were placed in a completely new, funhouse type environment with only one eye, you would be pretty messed up. So yes, a one eyed monster would only have depth perception from previous experience, and it would be poor.
Oct
28
comment Confusion about gravity
After 100,000 years they would both start moving towards the center (assuming equal mass).
Oct
28
awarded  Organizer
Oct
28
revised Confusion about gravity
fixed a word
Oct
28
suggested approved edit on Confusion about gravity
Oct
8
comment Special Relativity and Gravity
If you are simply asking if special relativity regards gravity? It does not.
Sep
12
comment What causes electrical boxes to hum?
Just an intuitive guess here, but the AC current generates a changing magnetic field. Maybe that causes the wires to vibrate in Earth's magnetic field.
Aug
30
revised Why, fundamentally, are particles charged?
just doing some nit-picking edits. changes "small" to "less massive"
Aug
30
suggested approved edit on Why, fundamentally, are particles charged?
Aug
30
comment What is voltage?
Voltage is simply a difference in electric charge, caused by a number of things. In a battery voltage is caused by a chemical reaction. In a lightning storm, voltage is created by friction. Essentially any time there are more electrons in one place than another you will get a voltage.