16,690 reputation
12352
bio website
location Vancouver, Canada
age 45
visits member for 4 years, 1 month
seen 52 mins ago

Mostly C++ programmer in Vancouver.
Specialising in image processing, 3d modeling, Lidar - I'm really a physicist


Feb
9
answered Why does a Pewter mug keep a beverage hot better than a foam cup?
Jan
31
revised How many colors exist?
fixed link
Jan
23
comment How do HUD optics create readable text so close to the eye?
The same way that the crosshairs on a telescopic sight or the focussing circle on a camera are visible. The optics makes a virtual image of it at a greater distance - ideally at infinity.
Dec
30
revised What is the simplest way to perform a Cavendish experiment?
added 9 characters in body
Dec
30
comment What is the simplest way to perform a Cavendish experiment?
@WetSavannaAnimalakaRodVance, sorry 18th Century, it's standard history shorthand at least in British English. The experiment was done in 1799
Dec
24
comment How light years is measured?
@Floris if you are in charge of fixing the defn of 'year' and the speed of light is fixed then you can have pretty much all the decimal places you want ;-)
Nov
26
revised Maneuvering a space shuttle using propulsion systems?
typo
Nov
22
comment Time should run slower near massive body
re downvote. It isn't a bad question, just slightly awkwardly phrased by somebody whose 1st language isn't English.
Nov
12
comment Maneuvering a space shuttle using propulsion systems?
@DavidHammen - it's a wrong assumption but not a bad one.
Nov
12
answered Maneuvering a space shuttle using propulsion systems?
Nov
11
comment What can be seen with a 114mm Aperture 675x Zoom Telescope?
You can buy decent 8x42 or 10x50 binoculars for \$50 from most of the made-in-china sites that will do better than a \$200 telescope - especially if you add a tripod. And you will also have a pair of binoculars.
Nov
4
answered 2.4Ghz microwaves have a 12cm wavelength. How do microwave ovens leak radiation, since any gap in the shielding is much smaller than that wavelength?
Nov
3
comment Should chemists at different altitudes factor in the specific gravity value when measuring mass via spring scale?
@Floris - I even wrote an answer on where would you weigh least but I can't find it
Nov
3
revised Should chemists at different altitudes factor in the specific gravity value when measuring mass via spring scale?
added 93 characters in body
Nov
3
answered Should chemists at different altitudes factor in the specific gravity value when measuring mass via spring scale?
Nov
1
comment Does electricity flow on the surface of a wire or in the interior?
Stranded cable is used for speakers because it is more flexible. Solid cable is used for permenent installs because it isn't flexible so won't move and potentially fray. Solid cable is used even for low current data cables in buildings. Capacitive coupling isn't an issue in the power cables in the link because the sep strands are on the same phase and at the same potential. Finally the hollow conductors at the hoover dam are probably to allow cooling rather than to provide a 2nd surface to reduce skin losses.
Oct
26
comment Is a suit that hides a soldier's heat signature fundamentally possible?
If they can maintain the 4degC dT then they are wasted doing camouflage. They could make $Bn by making engines and power plants more efficient
Oct
25
answered Does gravity change the pressure of a column of water when the column is tilted from horizontal to vertical?
Oct
6
awarded  Enlightened
Oct
6
awarded  Nice Answer