129,844 reputation
8215355
bio website ratsauce.co.uk
location Chester, United Kingdom
age 54
visits member for 4 years, 2 months
seen 8 hours ago

Semi retired old time computer nerd who started programming on a Commodore Pet.

Since I'm also active in the Physics forum I should add that I started as a theoretical chemist, moved into solid state photochemistry and finally worked in industry as a colloid scientist. I only became a full time computer nerd in 1997.


Nov
25
comment Why does iron sink in molten iron instead of floating?
@simha: see why exactly is ice less dense then water? or see this search for other related questions.
Nov
24
comment Gravitational Time Dilation Formula?
The time dilation is dependant on the gravitational potential not the gravitational force.
Nov
24
comment Can a ultracentrifuge be used to test general relativity?
@CarlosFreites: re your last comment: the equivalence principle tells us it is impossible to distinguish acceleration from gravity in a local measurement. However over any non-zero distance you can tell your options 1, 2 and 3 apart because the tidal variation of the force will be different in the three cases.
Nov
24
answered Separation distance of bright fringes in double slit experiment
Nov
24
comment Newton's third law.. please explain here
@SuyashPrakash: you will only be accelerating as long as you are pushing the table. Once the table is too far away for you to reach you can't push on it, so from that point you and the table will move at constant velocity.
Nov
24
comment Newton's third law.. please explain here
@SuyashPrakash: as long as you are pushing on the table you and the table will both be accelerated. Once you stop pushing you and the table will move at a constant velocity. If you push with a constant force then your (and the table's) acceleration will be constant. If the force of your push varies then so will the acceleration.
Nov
24
comment Newton's third law.. please explain here
@Alba: change of momentum = force $\times$ time. The time you push on the table must be the same as the time the table pushes on you, so therefore the momenta being the same means the forces are the same and vice versa.
Nov
24
comment Can a ultracentrifuge be used to test general relativity?
@CarlosFreites: which comment? If you mean your second comment asking about the three scenarios then I think that's a different question to the one you asked.
Nov
24
answered Newton's third law.. please explain here
Nov
24
comment Is time dilation a mechanical slowdown only?
See also Is time dilation an illusion?
Nov
24
comment Is time dilation a mechanical slowdown only?
possible duplicate of The real meaning of time dilation
Nov
24
reviewed No Action Needed Are black holes “Immortal”?
Nov
24
reviewed No Action Needed Newton's third law.. please explain here
Nov
24
reviewed No Action Needed What do we see while watching light? Waves or particles?
Nov
24
comment Are black holes “Immortal”?
They may not even exist!
Nov
24
reviewed Leave Closed Pushing over a block
Nov
24
reviewed Close Finding conserved quantities from Hamiltonian when Symmetry is not evident
Nov
24
reviewed Leave Open Energy in harmonic oscillator
Nov
24
reviewed Close tangential acceleration and angular acceleration
Nov
24
reviewed Close With what fraction photon quanta emission rate is decreased in the expanding universe?