416 reputation
511
bio website usabilityPolice.com
location London, United Kingdom
age
visits member for 3 years, 9 months
seen yesterday

Online Video, Web Development, Adobe Flash platform, MediaWiki platform, social media, usability enthusiast, social good ... and many more.

http://twitter.com/daniel_sedlacek


Dec
19
awarded  Critic
Dec
19
revised Does lunar module need the same amount of fuel for landing and take off?
added 1 character in body
Dec
19
answered Does lunar module need the same amount of fuel for landing and take off?
Dec
19
comment Does lunar module need the same amount of fuel for landing and take off?
nope, crash landing is not part of this question :)
Dec
19
revised Does lunar module need the same amount of fuel for landing and take off?
replaced word energy with fuel to eliminate the confusion including potential energy
Dec
19
awarded  Yearling
Dec
19
asked Does lunar module need the same amount of fuel for landing and take off?
Nov
20
comment Is there any limit on movement of space itself?
Every metaphor is imperfect simplification but that shouldn't prevent scientist from explaining concepts to layman. Strangely you don't like the rubber sheet metaphor - I used to think about objects in space as smarties in jello - if they are tunnelling through the jello they are moving. If the jello itself is warping bringing two objects closer or further then they were without them tunnelling through the jello then the space is moving while the objects are not moving. Or is this metaphor too far from reality?
Nov
20
awarded  Commentator
Nov
20
comment Is there any limit on movement of space itself?
Thanks for the undoing the hate. I am just a layman trying to understand interesting things.
Nov
20
comment Is there any limit on movement of space itself?
So space can expand, warp, wave, bend, distort but not move. Got it. So is there a limit at which can space move but not move?
Nov
20
comment Mach's principle in empty universe, centripetal force and violation of Newton's laws of motion
I am not a physicist, I was merely reading Wikipedia when I got curious about the absolute rotation question and in there Mach's principle is presented as credible theory, certainly not outmoded like flat Earth. Does that mean that absolute rotation is accepted by mainstream physicists and Mach's principle is considered outmoded?
Nov
20
comment Is there any limit on movement of space itself?
How is it different? Does the space not move when gravitation waves propagate through it?
Nov
20
asked Is there any limit on movement of space itself?
Nov
20
asked Mach's principle in empty universe, centripetal force and violation of Newton's laws of motion
Nov
11
asked In layman's terms, why would frame dragging affect precession of nearby object?
Sep
24
awarded  Autobiographer
Apr
24
awarded  Notable Question
Aug
24
accepted Is fire plasma?
Aug
20
accepted Angular momentum power plant on Earth