1,783 reputation
113
bio website
location
age
visits member for 1 year, 9 months
seen 4 hours ago

May
5
revised Is it possible to create artificial gravity by magnetizing iron in the blood stream?
added 58 characters in body
May
1
comment Magnetic field resistance material: are there any?
Ok thanks and welcome to Stack exchange!
Apr
30
comment Magnetic field resistance material: are there any?
If you like the answer please click the checkmark to "accept" it (you get 2 free rep when you accept answers). Speaker and hard disks magnets are shielded with a thick piece of steel or similar material, which act as a "conductor" of magnetic fields.
Apr
30
answered Magnetic field resistance material: are there any?
Apr
26
revised What Happens When A Gravitational Wave Interacts With Another One?
deleted 142 characters in body
Apr
26
answered What Happens When A Gravitational Wave Interacts With Another One?
Apr
26
comment What does “optical conductivity” mean?
Maybe it is AC conductivity but at such a high frequency that instead of electronically generating an AC signal and measuring the conductivity you use light.
Apr
7
comment Calculating the most probable radius for an electron of a hydrogen atom in the ground state
We use area because we want the probability that r is exactly 0.1 nm (technically probability density), not the probability that r is less than 0.1 nm.
Apr
7
comment Thomson's jumping ring experiment
Yes the ring will move toward (be attracted to) the field when the flux drops, but the ring will tend to repel more than attract overall (the explanation is complex, however). See youtube.com/watch?v=dw73DcwIX-A for a similar example: you get more repulsion on average.
Apr
7
revised Calculating the most probable radius for an electron of a hydrogen atom in the ground state
added 75 characters in body
Apr
7
comment Thomson's jumping ring experiment
At 60Hz it will levitate in a relatively fixed place. The current is constantly changing. Each "pulse" causes a repulsion of the ring.
Apr
7
answered Thomson's jumping ring experiment
Apr
7
answered Calculating the most probable radius for an electron of a hydrogen atom in the ground state
Apr
7
revised Dyson air blade principle as a propulsion system for an autonomous underwater vehicle?
added 173 characters in body
Apr
7
answered Dyson air blade principle as a propulsion system for an autonomous underwater vehicle?
Apr
5
comment How can super massive black holes have a lower density than water?
The water pool would pack more mass into a similar size of space the our BH, so the whole thing collapses into one giant BH immediately.
Mar
27
answered Do I need to take both particles' momentum into account in photoelectric emission?
Mar
21
comment Small object in air
Your drag equation assumes "inertial" drag, but "viscous drag" is more important at this tiny length scale. See en.wikipedia.org/wiki/Stokes'_law.
Mar
16
comment Primordial black hole: how dense does matter need to be to feed it?
The problem with a simple event-horizon-drain argument is that the accretion heat generated and/or the Hawking radiation would push matter away, counteracting the gravity. What rate of accretion before the heat generated produces a "bubble" that prevents other matter from entering? I don't know.
Mar
16
revised Primordial black hole: how dense does matter need to be to feed it?
added 86 characters in body