16,720 reputation
12352
bio website
location Vancouver, Canada
age 45
visits member for 4 years, 1 month
seen 12 hours ago

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


Dec
27
answered Why do the planets' orbital distances fall on an exponential curve?
Dec
24
answered How much effect does the mass of a bicycle tire have on acceleration?
Dec
23
comment Why can't airplanes just keep going up?
@Jonathon - some heavy transports used disposable rocket boosters (JATO) to help takeoff from short runways. But basically anything that flies in air uses air, it's cheap and widely available and you don't have to carry it!
Dec
23
comment Why can't airplanes just keep going up?
There is no real difference between a turbojet on a fighter and a turbofan on a 747 - they both need air to burn.
Dec
23
answered Why can't airplanes just keep going up?
Dec
22
comment Is electricity instantaneous?
Ironically the cable company here is promoting it's new fibre service as internet at the speed of light. Light goes 1.56 times slower in glass than electricity does in some types of coax
Dec
19
comment Can microwaves affect wifi - and can they harm us?
Even more ironic is that 2.4Ghz was chosen for Wifi and Bluetooth because nobody else used it - the same reason microwave ovens were allowed to use it years ago!
Dec
18
comment How does the focal length of the lens change the distance from the camera to an object?
@Porridge in astronomy you would be more interested in the diameter but otherwise if you are only given one number it's the focal length
Dec
18
answered How does the focal length of the lens change the distance from the camera to an object?
Dec
17
comment Does a car use friction to move?
And even for trains with "leaves on the line" en.wikipedia.org/wiki/Slippery_rail
Dec
17
answered Do we know exactly how fast we are going relative to the center of the galaxy
Dec
12
comment When has the speed of light been measured, recently?
Channels are about 25GHz wide on 300THz so close to that
Dec
11
comment How does a V formation save fuel for the lead plane?
Possibly physics.stackexchange.com/questions/5504/… but I suspect the cars would have to be very close (< 0.5 m?) to have an effect
Dec
11
answered When has the speed of light been measured, recently?
Dec
9
answered How does a V formation save fuel for the lead plane?
Dec
8
revised How light years is measured?
added 382 characters in body
Dec
8
revised How might clock synchronization work with RSA SecurID tokens?
added 148 characters in body
Dec
8
answered How might clock synchronization work with RSA SecurID tokens?
Dec
7
answered How do I get the focal length from a camera matrix?
Dec
7
answered How light years is measured?