2,370 reputation
923
bio website infosecfrog.blogspot.com
location Scotland, United Kingdom
age 42
visits member for 3 years, 1 month
seen Apr 11 at 17:18

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
Feb
15
answered Why does the presence of a battery change whether a circuit is in parallel or series?
Feb
15
awarded  Custodian
Feb
15
reviewed Reviewed Having difficulties finding objects with Celestron Telescope
Feb
14
answered comparing torque and 0-60 speed in cars
Jan
31
awarded  Civic Duty
Jan
28
revised What is the mass distribution within the sun?
Changed title to actually match the question.
Jan
28
suggested suggested edit on What is the mass distribution within the sun?
Jan
23
awarded  Excavator
Jan
23
revised Do we really know which slit the photon passed through in Afshar's experiment?
formatting for readability
Jan
23
suggested suggested edit on Do we really know which slit the photon passed through in Afshar's experiment?
Jan
14
comment What causes an aircraft to roll when rudder is applied
The primary cause of yaw induced roll is the differential in lift produced by the two wingtips travelling at different speeds. Certainly, you get a lot of other effects and secondary effects, but wing sweep is only a small factor.
Jan
12
awarded  Enthusiast
Jan
8
comment Estimating drag due to wind - ribbon-shaped sail
Remember jet stream winds can be over 50m/s, and they are unpredictable in their route. Admittedly the strongest ones are closer to the pole, but be aware of loops of high altitude (>30000m), high speed winds in any calculation.
Jan
7
comment Ideal distance of eye from a lens
This will depend entirely on combination of the lenses used and their focal length, and quite possibly on whether you care about the image being upright or inverted
Jan
3
comment Is it possible that there is a color our human eye can't see?
Ah - yes, Sorry @Bernhard - in re-reading, I agree with you.