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Apr
15
answered Concerning the curvature of an airfoil (shape)
Apr
6
comment Why does the sky look black in pictures taken from the summit of everest?
@user22834 - The explanation for these observations is that your second paragraph is incorrect.
Apr
6
comment Why does the sky look black in pictures taken from the summit of everest?
+1 ... it does this on every high flying aeroplane, and I have always enjoyed that deep blue above the curve of the horizon.
Apr
4
revised Pascal's law: pressure of fluid at different locations
corrected pressures
Apr
4
suggested approved edit on Pascal's law: pressure of fluid at different locations
Apr
1
comment Is a purely vertical or almost vertical orbital launch possible?
Heh - but what do you use to keep a 100 mile cable up? A 100 mile orbit is going to be pretty fast - it certainly isn't geostationary :-)
Apr
1
comment Is a purely vertical or almost vertical orbital launch possible?
Have a look at physics.stackexchange.com/questions/26739/… for some useful information.
Apr
1
comment Is a purely vertical or almost vertical orbital launch possible?
See the space elevator if you want a possible (nearly) solution to get to geostationary orbit (or twice that far-using matching earth to hub and hub to outer orbit cables)
Apr
1
answered Is a purely vertical or almost vertical orbital launch possible?
Mar
27
comment What would be the effects if Jupiter was to blown up?
This should be submitted directly to what-if.xkcd.com
Mar
12
awarded  Yearling
Mar
4
revised Observing visible light itself by our eyes
spelling in title
Mar
4
suggested approved edit on Observing visible light itself by our eyes
Mar
4
answered Observing visible light itself by our eyes
Feb
26
comment Flushing water-Is it related to Coriolis force?
Probably worthwhile looking at this question on Skeptics: skeptics.stackexchange.com/q/450/619
Feb
25
comment X-ray diffraction (is it possible?)
Richard - how big is the crystal? Raindrop's answer covers small crystals, but the larger the crystal, the more difficult it is to analyse the data. Too big, and you just can't do it .
Feb
19
comment Are there still 'everyday' phenomena unexplained by Physics?
But the repeated predictions work for turbulent flow. We can calculate it. We know how to do it. That it is incredibly complex because there are so many interactions is self evident.
Feb
19
comment Are there still 'everyday' phenomena unexplained by Physics?
Surely many of these can be explained, but the challenge is simply that computation is complex.
Feb
18
answered Why isn't average speed equal to displacement over time?
Feb
15
revised Why does the presence of a battery change whether a circuit is in parallel or series?
added 114 characters in body